Home / 13,915.20-19,204.01-8,613.10

Finding the Fourth Proportional to 13,915.20, 19,204.01 and 8,613.10

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Solution

The fourth proportional to 13,915.20, 19,204.01 and 8,613.10 is: 11,886.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.20 : 19,204.01 = 8,613.10 : x
  2. Step 2: Convert to fraction form
    13,915.20/19,204.01 = 8,613.10/x
  3. Step 3: Cross multiply
    13,915.20x = 19,204.01 × 8,613.10
  4. Step 4: Simplify right side
    13,915.20x = 165,406,058.53
  5. Step 5: Solve for x
    x = 165,406,058.53/13,915.20
  6. Step 6: Final answer
    x = 11,886.72

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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.