Home / 20,357.84-28,081.40-13,458.98

Finding the Fourth Proportional to 20,357.84, 28,081.40 and 13,458.98

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Solution

The fourth proportional to 20,357.84, 28,081.40 and 13,458.98 is: 18,565.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,357.84 : 28,081.40 = 13,458.98 : x
  2. Step 2: Convert to fraction form
    20,357.84/28,081.40 = 13,458.98/x
  3. Step 3: Cross multiply
    20,357.84x = 28,081.40 × 13,458.98
  4. Step 4: Simplify right side
    20,357.84x = 377,947,000.97
  5. Step 5: Solve for x
    x = 377,947,000.97/20,357.84
  6. Step 6: Final answer
    x = 18,565.18

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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.