Home / 20,417.70-28,167.96-11,915.61

Finding the Fourth Proportional to 20,417.70, 28,167.96 and 11,915.61

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Solution

The fourth proportional to 20,417.70, 28,167.96 and 11,915.61 is: 16,438.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,417.70 : 28,167.96 = 11,915.61 : x
  2. Step 2: Convert to fraction form
    20,417.70/28,167.96 = 11,915.61/x
  3. Step 3: Cross multiply
    20,417.70x = 28,167.96 × 11,915.61
  4. Step 4: Simplify right side
    20,417.70x = 335,638,425.86
  5. Step 5: Solve for x
    x = 335,638,425.86/20,417.70
  6. Step 6: Final answer
    x = 16,438.60

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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.