Home / 20,429.61-28,191.33-11,475.38

Finding the Fourth Proportional to 20,429.61, 28,191.33 and 11,475.38

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Solution

The fourth proportional to 20,429.61, 28,191.33 and 11,475.38 is: 15,835.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.61 : 28,191.33 = 11,475.38 : x
  2. Step 2: Convert to fraction form
    20,429.61/28,191.33 = 11,475.38/x
  3. Step 3: Cross multiply
    20,429.61x = 28,191.33 × 11,475.38
  4. Step 4: Simplify right side
    20,429.61x = 323,506,083.50
  5. Step 5: Solve for x
    x = 323,506,083.50/20,429.61
  6. Step 6: Final answer
    x = 15,835.16

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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.