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Finding the Fourth Proportional to 9,489.12, 14,235.68 and 2,915.68

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Solution

The fourth proportional to 9,489.12, 14,235.68 and 2,915.68 is: 4,374.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,489.12 : 14,235.68 = 2,915.68 : x
  2. Step 2: Convert to fraction form
    9,489.12/14,235.68 = 2,915.68/x
  3. Step 3: Cross multiply
    9,489.12x = 14,235.68 × 2,915.68
  4. Step 4: Simplify right side
    9,489.12x = 41,506,687.46
  5. Step 5: Solve for x
    x = 41,506,687.46/9,489.12
  6. Step 6: Final answer
    x = 4,374.13

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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.