Home / 20,970.30-28,937.25-12,355.11

Finding the Fourth Proportional to 20,970.30, 28,937.25 and 12,355.11

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Solution

The fourth proportional to 20,970.30, 28,937.25 and 12,355.11 is: 17,049.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.30 : 28,937.25 = 12,355.11 : x
  2. Step 2: Convert to fraction form
    20,970.30/28,937.25 = 12,355.11/x
  3. Step 3: Cross multiply
    20,970.30x = 28,937.25 × 12,355.11
  4. Step 4: Simplify right side
    20,970.30x = 357,522,906.85
  5. Step 5: Solve for x
    x = 357,522,906.85/20,970.30
  6. Step 6: Final answer
    x = 17,049.01

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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.