Home / 18,821.48-28,342.18-13,925.56

Finding the Fourth Proportional to 18,821.48, 28,342.18 and 13,925.56

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Solution

The fourth proportional to 18,821.48, 28,342.18 and 13,925.56 is: 20,969.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821.48 : 28,342.18 = 13,925.56 : x
  2. Step 2: Convert to fraction form
    18,821.48/28,342.18 = 13,925.56/x
  3. Step 3: Cross multiply
    18,821.48x = 28,342.18 × 13,925.56
  4. Step 4: Simplify right side
    18,821.48x = 394,680,728.12
  5. Step 5: Solve for x
    x = 394,680,728.12/18,821.48
  6. Step 6: Final answer
    x = 20,969.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.