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Finding the Fourth Proportional to 28,281.64, 42,423 and 8,560.12

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Solution

The fourth proportional to 28,281.64, 42,423 and 8,560.12 is: 12,840.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,281.64 : 42,423 = 8,560.12 : x
  2. Step 2: Convert to fraction form
    28,281.64/42,423 = 8,560.12/x
  3. Step 3: Cross multiply
    28,281.64x = 42,423 × 8,560.12
  4. Step 4: Simplify right side
    28,281.64x = 363,145,970.76
  5. Step 5: Solve for x
    x = 363,145,970.76/28,281.64
  6. Step 6: Final answer
    x = 12,840.34

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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.