Home / 20,423.67-28,181.10-11,471.55

Finding the Fourth Proportional to 20,423.67, 28,181.10 and 11,471.55

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Solution

The fourth proportional to 20,423.67, 28,181.10 and 11,471.55 is: 15,828.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.67 : 28,181.10 = 11,471.55 : x
  2. Step 2: Convert to fraction form
    20,423.67/28,181.10 = 11,471.55/x
  3. Step 3: Cross multiply
    20,423.67x = 28,181.10 × 11,471.55
  4. Step 4: Simplify right side
    20,423.67x = 323,280,897.71
  5. Step 5: Solve for x
    x = 323,280,897.71/20,423.67
  6. Step 6: Final answer
    x = 15,828.74

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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.