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Finding the Fourth Proportional to 18,879.48, 28,337.76 and 10,565.64

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Solution

The fourth proportional to 18,879.48, 28,337.76 and 10,565.64 is: 15,858.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.48 : 28,337.76 = 10,565.64 : x
  2. Step 2: Convert to fraction form
    18,879.48/28,337.76 = 10,565.64/x
  3. Step 3: Cross multiply
    18,879.48x = 28,337.76 × 10,565.64
  4. Step 4: Simplify right side
    18,879.48x = 299,406,570.57
  5. Step 5: Solve for x
    x = 299,406,570.57/18,879.48
  6. Step 6: Final answer
    x = 15,858.84

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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.