Home / 20,506.14-28,287.51-13,780.20

Finding the Fourth Proportional to 20,506.14, 28,287.51 and 13,780.20

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Solution

The fourth proportional to 20,506.14, 28,287.51 and 13,780.20 is: 19,009.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,506.14 : 28,287.51 = 13,780.20 : x
  2. Step 2: Convert to fraction form
    20,506.14/28,287.51 = 13,780.20/x
  3. Step 3: Cross multiply
    20,506.14x = 28,287.51 × 13,780.20
  4. Step 4: Simplify right side
    20,506.14x = 389,807,545.30
  5. Step 5: Solve for x
    x = 389,807,545.30/20,506.14
  6. Step 6: Final answer
    x = 19,009.31

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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.