Home / 20,386.80-28,134.90-11,437.14

Finding the Fourth Proportional to 20,386.80, 28,134.90 and 11,437.14

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Solution

The fourth proportional to 20,386.80, 28,134.90 and 11,437.14 is: 15,783.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.80 : 28,134.90 = 11,437.14 : x
  2. Step 2: Convert to fraction form
    20,386.80/28,134.90 = 11,437.14/x
  3. Step 3: Cross multiply
    20,386.80x = 28,134.90 × 11,437.14
  4. Step 4: Simplify right side
    20,386.80x = 321,782,790.19
  5. Step 5: Solve for x
    x = 321,782,790.19/20,386.80
  6. Step 6: Final answer
    x = 15,783.88

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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.