Home / 20,731.32-28,491.30-19,419.12

Finding the Fourth Proportional to 20,731.32, 28,491.30 and 19,419.12

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Solution

The fourth proportional to 20,731.32, 28,491.30 and 19,419.12 is: 26,687.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.32 : 28,491.30 = 19,419.12 : x
  2. Step 2: Convert to fraction form
    20,731.32/28,491.30 = 19,419.12/x
  3. Step 3: Cross multiply
    20,731.32x = 28,491.30 × 19,419.12
  4. Step 4: Simplify right side
    20,731.32x = 553,275,973.66
  5. Step 5: Solve for x
    x = 553,275,973.66/20,731.32
  6. Step 6: Final answer
    x = 26,687.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.