Home / 20,971.17-31,456.76-9,124.52

Finding the Fourth Proportional to 20,971.17, 31,456.76 and 9,124.52

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Solution

The fourth proportional to 20,971.17, 31,456.76 and 9,124.52 is: 13,686.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.17 : 31,456.76 = 9,124.52 : x
  2. Step 2: Convert to fraction form
    20,971.17/31,456.76 = 9,124.52/x
  3. Step 3: Cross multiply
    20,971.17x = 31,456.76 × 9,124.52
  4. Step 4: Simplify right side
    20,971.17x = 287,027,632.85
  5. Step 5: Solve for x
    x = 287,027,632.85/20,971.17
  6. Step 6: Final answer
    x = 13,686.77

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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.