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Finding the Fourth Proportional to 18,343.71, 25,314.18 and 10,385.87

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Solution

The fourth proportional to 18,343.71, 25,314.18 and 10,385.87 is: 14,332.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,343.71 : 25,314.18 = 10,385.87 : x
  2. Step 2: Convert to fraction form
    18,343.71/25,314.18 = 10,385.87/x
  3. Step 3: Cross multiply
    18,343.71x = 25,314.18 × 10,385.87
  4. Step 4: Simplify right side
    18,343.71x = 262,909,656.07
  5. Step 5: Solve for x
    x = 262,909,656.07/18,343.71
  6. Step 6: Final answer
    x = 14,332.41

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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.