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Finding the Fourth Proportional to 12,881.70, 19,322.55 and 7,352.10

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Solution

The fourth proportional to 12,881.70, 19,322.55 and 7,352.10 is: 11,028.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.70 : 19,322.55 = 7,352.10 : x
  2. Step 2: Convert to fraction form
    12,881.70/19,322.55 = 7,352.10/x
  3. Step 3: Cross multiply
    12,881.70x = 19,322.55 × 7,352.10
  4. Step 4: Simplify right side
    12,881.70x = 142,061,319.86
  5. Step 5: Solve for x
    x = 142,061,319.86/12,881.70
  6. Step 6: Final answer
    x = 11,028.15

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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.