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Finding the Fourth Proportional to 15,125.40, 20,872.94 and 8,411.64

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Solution

The fourth proportional to 15,125.40, 20,872.94 and 8,411.64 is: 11,608.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,125.40 : 20,872.94 = 8,411.64 : x
  2. Step 2: Convert to fraction form
    15,125.40/20,872.94 = 8,411.64/x
  3. Step 3: Cross multiply
    15,125.40x = 20,872.94 × 8,411.64
  4. Step 4: Simplify right side
    15,125.40x = 175,575,657.02
  5. Step 5: Solve for x
    x = 175,575,657.02/15,125.40
  6. Step 6: Final answer
    x = 11,608.00

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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.