Home / 15,685.16-21,645.54-8,612.03

Finding the Fourth Proportional to 15,685.16, 21,645.54 and 8,612.03

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Solution

The fourth proportional to 15,685.16, 21,645.54 and 8,612.03 is: 11,884.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.16 : 21,645.54 = 8,612.03 : x
  2. Step 2: Convert to fraction form
    15,685.16/21,645.54 = 8,612.03/x
  3. Step 3: Cross multiply
    15,685.16x = 21,645.54 × 8,612.03
  4. Step 4: Simplify right side
    15,685.16x = 186,411,931.62
  5. Step 5: Solve for x
    x = 186,411,931.62/15,685.16
  6. Step 6: Final answer
    x = 11,884.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.