Home / 20,499.61-28,285.70-11,545.19

Finding the Fourth Proportional to 20,499.61, 28,285.70 and 11,545.19

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Solution

The fourth proportional to 20,499.61, 28,285.70 and 11,545.19 is: 15,930.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,499.61 : 28,285.70 = 11,545.19 : x
  2. Step 2: Convert to fraction form
    20,499.61/28,285.70 = 11,545.19/x
  3. Step 3: Cross multiply
    20,499.61x = 28,285.70 × 11,545.19
  4. Step 4: Simplify right side
    20,499.61x = 326,563,915.72
  5. Step 5: Solve for x
    x = 326,563,915.72/20,499.61
  6. Step 6: Final answer
    x = 15,930.25

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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.