Home / 38,680.71-58,021.88-12,385.38

Finding the Fourth Proportional to 38,680.71, 58,021.88 and 12,385.38

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Solution

The fourth proportional to 38,680.71, 58,021.88 and 12,385.38 is: 18,578.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,680.71 : 58,021.88 = 12,385.38 : x
  2. Step 2: Convert to fraction form
    38,680.71/58,021.88 = 12,385.38/x
  3. Step 3: Cross multiply
    38,680.71x = 58,021.88 × 12,385.38
  4. Step 4: Simplify right side
    38,680.71x = 718,623,032.11
  5. Step 5: Solve for x
    x = 718,623,032.11/38,680.71
  6. Step 6: Final answer
    x = 18,578.33

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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.