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Finding the Fourth Proportional to 12,459.60, 17,145.60 and 12,382.92

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Solution

The fourth proportional to 12,459.60, 17,145.60 and 12,382.92 is: 17,040.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,459.60 : 17,145.60 = 12,382.92 : x
  2. Step 2: Convert to fraction form
    12,459.60/17,145.60 = 12,382.92/x
  3. Step 3: Cross multiply
    12,459.60x = 17,145.60 × 12,382.92
  4. Step 4: Simplify right side
    12,459.60x = 212,312,593.15
  5. Step 5: Solve for x
    x = 212,312,593.15/12,459.60
  6. Step 6: Final answer
    x = 17,040.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.