Home / 20,801.30-28,705.36-11,369.92

Finding the Fourth Proportional to 20,801.30, 28,705.36 and 11,369.92

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Solution

The fourth proportional to 20,801.30, 28,705.36 and 11,369.92 is: 15,690.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.30 : 28,705.36 = 11,369.92 : x
  2. Step 2: Convert to fraction form
    20,801.30/28,705.36 = 11,369.92/x
  3. Step 3: Cross multiply
    20,801.30x = 28,705.36 × 11,369.92
  4. Step 4: Simplify right side
    20,801.30x = 326,377,646.77
  5. Step 5: Solve for x
    x = 326,377,646.77/20,801.30
  6. Step 6: Final answer
    x = 15,690.25

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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.