Home / 3,127.47-4,312.46-2,130.75

Finding the Fourth Proportional to 3,127.47, 4,312.46 and 2,130.75

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Solution

The fourth proportional to 3,127.47, 4,312.46 and 2,130.75 is: 2,938.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.47 : 4,312.46 = 2,130.75 : x
  2. Step 2: Convert to fraction form
    3,127.47/4,312.46 = 2,130.75/x
  3. Step 3: Cross multiply
    3,127.47x = 4,312.46 × 2,130.75
  4. Step 4: Simplify right side
    3,127.47x = 9,188,763.49
  5. Step 5: Solve for x
    x = 9,188,763.49/3,127.47
  6. Step 6: Final answer
    x = 2,938.08

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Half scale
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Double scale
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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.