Home / 21,272.90-31,909.34-5,690.12

Finding the Fourth Proportional to 21,272.90, 31,909.34 and 5,690.12

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Solution

The fourth proportional to 21,272.90, 31,909.34 and 5,690.12 is: 8,535.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.90 : 31,909.34 = 5,690.12 : x
  2. Step 2: Convert to fraction form
    21,272.90/31,909.34 = 5,690.12/x
  3. Step 3: Cross multiply
    21,272.90x = 31,909.34 × 5,690.12
  4. Step 4: Simplify right side
    21,272.90x = 181,567,785.72
  5. Step 5: Solve for x
    x = 181,567,785.72/21,272.90
  6. Step 6: Final answer
    x = 8,535.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.