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Finding the Fourth Proportional to 9,990.81, 14,960.58 and 9,695.18

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Solution

The fourth proportional to 9,990.81, 14,960.58 and 9,695.18 is: 14,517.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.81 : 14,960.58 = 9,695.18 : x
  2. Step 2: Convert to fraction form
    9,990.81/14,960.58 = 9,695.18/x
  3. Step 3: Cross multiply
    9,990.81x = 14,960.58 × 9,695.18
  4. Step 4: Simplify right side
    9,990.81x = 145,045,441.20
  5. Step 5: Solve for x
    x = 145,045,441.20/9,990.81
  6. Step 6: Final answer
    x = 14,517.89

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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.