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Finding the Fourth Proportional to 15,244.80, 21,038.80 and 8,531.20

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Solution

The fourth proportional to 15,244.80, 21,038.80 and 8,531.20 is: 11,773.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,244.80 : 21,038.80 = 8,531.20 : x
  2. Step 2: Convert to fraction form
    15,244.80/21,038.80 = 8,531.20/x
  3. Step 3: Cross multiply
    15,244.80x = 21,038.80 × 8,531.20
  4. Step 4: Simplify right side
    15,244.80x = 179,486,210.56
  5. Step 5: Solve for x
    x = 179,486,210.56/15,244.80
  6. Step 6: Final answer
    x = 11,773.60

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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.