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Finding the Fourth Proportional to 18,875.71, 28,335.43 and 10,127.71

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Solution

The fourth proportional to 18,875.71, 28,335.43 and 10,127.71 is: 15,203.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,875.71 : 28,335.43 = 10,127.71 : x
  2. Step 2: Convert to fraction form
    18,875.71/28,335.43 = 10,127.71/x
  3. Step 3: Cross multiply
    18,875.71x = 28,335.43 × 10,127.71
  4. Step 4: Simplify right side
    18,875.71x = 286,972,906.46
  5. Step 5: Solve for x
    x = 286,972,906.46/18,875.71
  6. Step 6: Final answer
    x = 15,203.29

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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.