Home / 19,003.71-28,512.87-13,386.78

Finding the Fourth Proportional to 19,003.71, 28,512.87 and 13,386.78

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Solution

The fourth proportional to 19,003.71, 28,512.87 and 13,386.78 is: 20,085.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,003.71 : 28,512.87 = 13,386.78 : x
  2. Step 2: Convert to fraction form
    19,003.71/28,512.87 = 13,386.78/x
  3. Step 3: Cross multiply
    19,003.71x = 28,512.87 × 13,386.78
  4. Step 4: Simplify right side
    19,003.71x = 381,695,517.86
  5. Step 5: Solve for x
    x = 381,695,517.86/19,003.71
  6. Step 6: Final answer
    x = 20,085.32

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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.