Home / 7,128,685.80-10,693,028.70-5,215,498.20

Finding the Fourth Proportional to 7,128,685.80, 10,693,028.70 and 5,215,498.20

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Solution

The fourth proportional to 7,128,685.80, 10,693,028.70 and 5,215,498.20 is: 7,823,247.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128,685.80 : 10,693,028.70 = 5,215,498.20 : x
  2. Step 2: Convert to fraction form
    7,128,685.80/10,693,028.70 = 5,215,498.20/x
  3. Step 3: Cross multiply
    7,128,685.80x = 10,693,028.70 × 5,215,498.20
  4. Step 4: Simplify right side
    7,128,685.80x = 55,769,471,937,398.34
  5. Step 5: Solve for x
    x = 55,769,471,937,398.34/7,128,685.80
  6. Step 6: Final answer
    x = 7,823,247.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.