Home / 20,898.12-28,840.68-13,812.24

Finding the Fourth Proportional to 20,898.12, 28,840.68 and 13,812.24

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Solution

The fourth proportional to 20,898.12, 28,840.68 and 13,812.24 is: 19,061.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.12 : 28,840.68 = 13,812.24 : x
  2. Step 2: Convert to fraction form
    20,898.12/28,840.68 = 13,812.24/x
  3. Step 3: Cross multiply
    20,898.12x = 28,840.68 × 13,812.24
  4. Step 4: Simplify right side
    20,898.12x = 398,354,393.92
  5. Step 5: Solve for x
    x = 398,354,393.92/20,898.12
  6. Step 6: Final answer
    x = 19,061.73

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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.