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Finding the Fourth Proportional to 11,302.88, 15,579.92 and 8,909.04

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Solution

The fourth proportional to 11,302.88, 15,579.92 and 8,909.04 is: 12,280.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,302.88 : 15,579.92 = 8,909.04 : x
  2. Step 2: Convert to fraction form
    11,302.88/15,579.92 = 8,909.04/x
  3. Step 3: Cross multiply
    11,302.88x = 15,579.92 × 8,909.04
  4. Step 4: Simplify right side
    11,302.88x = 138,802,130.48
  5. Step 5: Solve for x
    x = 138,802,130.48/11,302.88
  6. Step 6: Final answer
    x = 12,280.24

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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.