Home / 15,427.71-21,290.04-8,712.90

Finding the Fourth Proportional to 15,427.71, 21,290.04 and 8,712.90

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Solution

The fourth proportional to 15,427.71, 21,290.04 and 8,712.90 is: 12,023.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,427.71 : 21,290.04 = 8,712.90 : x
  2. Step 2: Convert to fraction form
    15,427.71/21,290.04 = 8,712.90/x
  3. Step 3: Cross multiply
    15,427.71x = 21,290.04 × 8,712.90
  4. Step 4: Simplify right side
    15,427.71x = 185,497,989.52
  5. Step 5: Solve for x
    x = 185,497,989.52/15,427.71
  6. Step 6: Final answer
    x = 12,023.69

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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.