Home / 19,981.71-29,934.10-12,488.20

Finding the Fourth Proportional to 19,981.71, 29,934.10 and 12,488.20

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Solution

The fourth proportional to 19,981.71, 29,934.10 and 12,488.20 is: 18,708.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,981.71 : 29,934.10 = 12,488.20 : x
  2. Step 2: Convert to fraction form
    19,981.71/29,934.10 = 12,488.20/x
  3. Step 3: Cross multiply
    19,981.71x = 29,934.10 × 12,488.20
  4. Step 4: Simplify right side
    19,981.71x = 373,822,921.56
  5. Step 5: Solve for x
    x = 373,822,921.56/19,981.71
  6. Step 6: Final answer
    x = 18,708.25

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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.