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Finding the Fourth Proportional to 9,660.40, 14,490.60 and 9,077.20

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Solution

The fourth proportional to 9,660.40, 14,490.60 and 9,077.20 is: 13,615.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,660.40 : 14,490.60 = 9,077.20 : x
  2. Step 2: Convert to fraction form
    9,660.40/14,490.60 = 9,077.20/x
  3. Step 3: Cross multiply
    9,660.40x = 14,490.60 × 9,077.20
  4. Step 4: Simplify right side
    9,660.40x = 131,534,074.32
  5. Step 5: Solve for x
    x = 131,534,074.32/9,660.40
  6. Step 6: Final answer
    x = 13,615.80

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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.