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Finding the Fourth Proportional to 9,443.12, 14,142.76 and 9,115.12

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Solution

The fourth proportional to 9,443.12, 14,142.76 and 9,115.12 is: 13,651.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,443.12 : 14,142.76 = 9,115.12 : x
  2. Step 2: Convert to fraction form
    9,443.12/14,142.76 = 9,115.12/x
  3. Step 3: Cross multiply
    9,443.12x = 14,142.76 × 9,115.12
  4. Step 4: Simplify right side
    9,443.12x = 128,912,954.53
  5. Step 5: Solve for x
    x = 128,912,954.53/9,443.12
  6. Step 6: Final answer
    x = 13,651.52

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Half scale
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Double scale
Find fourth proportional to 9,444.12, 14,144.26 and 9,116.12
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.