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Finding the Fourth Proportional to 18,870.68, 26,042.28 and 10,487

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Solution

The fourth proportional to 18,870.68, 26,042.28 and 10,487 is: 14,472.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.68 : 26,042.28 = 10,487 : x
  2. Step 2: Convert to fraction form
    18,870.68/26,042.28 = 10,487/x
  3. Step 3: Cross multiply
    18,870.68x = 26,042.28 × 10,487
  4. Step 4: Simplify right side
    18,870.68x = 273,105,390.36
  5. Step 5: Solve for x
    x = 273,105,390.36/18,870.68
  6. Step 6: Final answer
    x = 14,472.47

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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.