Home / 13,459.91-20,140.65-7,915.86

Finding the Fourth Proportional to 13,459.91, 20,140.65 and 7,915.86

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Solution

The fourth proportional to 13,459.91, 20,140.65 and 7,915.86 is: 11,844.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,459.91 : 20,140.65 = 7,915.86 : x
  2. Step 2: Convert to fraction form
    13,459.91/20,140.65 = 7,915.86/x
  3. Step 3: Cross multiply
    13,459.91x = 20,140.65 × 7,915.86
  4. Step 4: Simplify right side
    13,459.91x = 159,430,565.71
  5. Step 5: Solve for x
    x = 159,430,565.71/13,459.91
  6. Step 6: Final answer
    x = 11,844.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.