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Finding the Fourth Proportional to 10,915.08, 15,062.16 and 6,439

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Solution

The fourth proportional to 10,915.08, 15,062.16 and 6,439 is: 8,885.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,915.08 : 15,062.16 = 6,439 : x
  2. Step 2: Convert to fraction form
    10,915.08/15,062.16 = 6,439/x
  3. Step 3: Cross multiply
    10,915.08x = 15,062.16 × 6,439
  4. Step 4: Simplify right side
    10,915.08x = 96,985,248.24
  5. Step 5: Solve for x
    x = 96,985,248.24/10,915.08
  6. Step 6: Final answer
    x = 8,885.44

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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.