Home / 20,549.13-28,358-11,117.89

Finding the Fourth Proportional to 20,549.13, 28,358 and 11,117.89

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Solution

The fourth proportional to 20,549.13, 28,358 and 11,117.89 is: 15,342.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,549.13 : 28,358 = 11,117.89 : x
  2. Step 2: Convert to fraction form
    20,549.13/28,358 = 11,117.89/x
  3. Step 3: Cross multiply
    20,549.13x = 28,358 × 11,117.89
  4. Step 4: Simplify right side
    20,549.13x = 315,281,124.62
  5. Step 5: Solve for x
    x = 315,281,124.62/20,549.13
  6. Step 6: Final answer
    x = 15,342.80

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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.