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Finding the Fourth Proportional to 28,440.18, 42,651 and 9,459.72

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Solution

The fourth proportional to 28,440.18, 42,651 and 9,459.72 is: 14,186.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,440.18 : 42,651 = 9,459.72 : x
  2. Step 2: Convert to fraction form
    28,440.18/42,651 = 9,459.72/x
  3. Step 3: Cross multiply
    28,440.18x = 42,651 × 9,459.72
  4. Step 4: Simplify right side
    28,440.18x = 403,466,517.72
  5. Step 5: Solve for x
    x = 403,466,517.72/28,440.18
  6. Step 6: Final answer
    x = 14,186.50

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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.