Home / 20,823.75-28,737.18-12,440.25

Finding the Fourth Proportional to 20,823.75, 28,737.18 and 12,440.25

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Solution

The fourth proportional to 20,823.75, 28,737.18 and 12,440.25 is: 17,167.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.75 : 28,737.18 = 12,440.25 : x
  2. Step 2: Convert to fraction form
    20,823.75/28,737.18 = 12,440.25/x
  3. Step 3: Cross multiply
    20,823.75x = 28,737.18 × 12,440.25
  4. Step 4: Simplify right side
    20,823.75x = 357,497,703.50
  5. Step 5: Solve for x
    x = 357,497,703.50/20,823.75
  6. Step 6: Final answer
    x = 17,167.79

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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.