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Finding the Fourth Proportional to 15,909.60, 23,864.40 and 15,520.80

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Solution

The fourth proportional to 15,909.60, 23,864.40 and 15,520.80 is: 23,281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,909.60 : 23,864.40 = 15,520.80 : x
  2. Step 2: Convert to fraction form
    15,909.60/23,864.40 = 15,520.80/x
  3. Step 3: Cross multiply
    15,909.60x = 23,864.40 × 15,520.80
  4. Step 4: Simplify right side
    15,909.60x = 370,394,579.52
  5. Step 5: Solve for x
    x = 370,394,579.52/15,909.60
  6. Step 6: Final answer
    x = 23,281.20

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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.