Home / 20,490.98-28,277.52-11,538.06

Finding the Fourth Proportional to 20,490.98, 28,277.52 and 11,538.06

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Solution

The fourth proportional to 20,490.98, 28,277.52 and 11,538.06 is: 15,922.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.98 : 28,277.52 = 11,538.06 : x
  2. Step 2: Convert to fraction form
    20,490.98/28,277.52 = 11,538.06/x
  3. Step 3: Cross multiply
    20,490.98x = 28,277.52 × 11,538.06
  4. Step 4: Simplify right side
    20,490.98x = 326,267,722.41
  5. Step 5: Solve for x
    x = 326,267,722.41/20,490.98
  6. Step 6: Final answer
    x = 15,922.50

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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.