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Finding the Fourth Proportional to 27,337.60, 40,909.20 and 18,978.40

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Solution

The fourth proportional to 27,337.60, 40,909.20 and 18,978.40 is: 28,400.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,337.60 : 40,909.20 = 18,978.40 : x
  2. Step 2: Convert to fraction form
    27,337.60/40,909.20 = 18,978.40/x
  3. Step 3: Cross multiply
    27,337.60x = 40,909.20 × 18,978.40
  4. Step 4: Simplify right side
    27,337.60x = 776,391,161.28
  5. Step 5: Solve for x
    x = 776,391,161.28/27,337.60
  6. Step 6: Final answer
    x = 28,400.12

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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.