Home / 10,915.31-15,062.43-6,439.25

Finding the Fourth Proportional to 10,915.31, 15,062.43 and 6,439.25

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Solution

The fourth proportional to 10,915.31, 15,062.43 and 6,439.25 is: 8,885.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,915.31 : 15,062.43 = 6,439.25 : x
  2. Step 2: Convert to fraction form
    10,915.31/15,062.43 = 6,439.25/x
  3. Step 3: Cross multiply
    10,915.31x = 15,062.43 × 6,439.25
  4. Step 4: Simplify right side
    10,915.31x = 96,990,752.38
  5. Step 5: Solve for x
    x = 96,990,752.38/10,915.31
  6. Step 6: Final answer
    x = 8,885.75

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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.