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Finding the Fourth Proportional to 12,959.04, 17,877.84 and 8,240.78

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Solution

The fourth proportional to 12,959.04, 17,877.84 and 8,240.78 is: 11,368.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,959.04 : 17,877.84 = 8,240.78 : x
  2. Step 2: Convert to fraction form
    12,959.04/17,877.84 = 8,240.78/x
  3. Step 3: Cross multiply
    12,959.04x = 17,877.84 × 8,240.78
  4. Step 4: Simplify right side
    12,959.04x = 147,327,346.32
  5. Step 5: Solve for x
    x = 147,327,346.32/12,959.04
  6. Step 6: Final answer
    x = 11,368.69

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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.