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Finding the Fourth Proportional to 18,779.62, 25,915.14 and 11,230.12

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Solution

The fourth proportional to 18,779.62, 25,915.14 and 11,230.12 is: 15,497.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.62 : 25,915.14 = 11,230.12 : x
  2. Step 2: Convert to fraction form
    18,779.62/25,915.14 = 11,230.12/x
  3. Step 3: Cross multiply
    18,779.62x = 25,915.14 × 11,230.12
  4. Step 4: Simplify right side
    18,779.62x = 291,030,132.02
  5. Step 5: Solve for x
    x = 291,030,132.02/18,779.62
  6. Step 6: Final answer
    x = 15,497.13

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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.