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Finding the Fourth Proportional to 28,432.60, 42,648.90 and 9,964.60

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Solution

The fourth proportional to 28,432.60, 42,648.90 and 9,964.60 is: 14,946.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,432.60 : 42,648.90 = 9,964.60 : x
  2. Step 2: Convert to fraction form
    28,432.60/42,648.90 = 9,964.60/x
  3. Step 3: Cross multiply
    28,432.60x = 42,648.90 × 9,964.60
  4. Step 4: Simplify right side
    28,432.60x = 424,979,228.94
  5. Step 5: Solve for x
    x = 424,979,228.94/28,432.60
  6. Step 6: Final answer
    x = 14,946.90

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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.