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Finding the Fourth Proportional to 18,627.71, 25,706.34 and 10,129.93

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Solution

The fourth proportional to 18,627.71, 25,706.34 and 10,129.93 is: 13,979.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,627.71 : 25,706.34 = 10,129.93 : x
  2. Step 2: Convert to fraction form
    18,627.71/25,706.34 = 10,129.93/x
  3. Step 3: Cross multiply
    18,627.71x = 25,706.34 × 10,129.93
  4. Step 4: Simplify right side
    18,627.71x = 260,403,360.49
  5. Step 5: Solve for x
    x = 260,403,360.49/18,627.71
  6. Step 6: Final answer
    x = 13,979.36

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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.