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Finding the Fourth Proportional to 9,312.30, 13,968.45 and 7,125.30

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Solution

The fourth proportional to 9,312.30, 13,968.45 and 7,125.30 is: 10,687.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,312.30 : 13,968.45 = 7,125.30 : x
  2. Step 2: Convert to fraction form
    9,312.30/13,968.45 = 7,125.30/x
  3. Step 3: Cross multiply
    9,312.30x = 13,968.45 × 7,125.30
  4. Step 4: Simplify right side
    9,312.30x = 99,529,396.79
  5. Step 5: Solve for x
    x = 99,529,396.79/9,312.30
  6. Step 6: Final answer
    x = 10,687.95

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Double scale
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Similar ratio
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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.