Home / 21,321.60-31,824.48-20,008.32

Finding the Fourth Proportional to 21,321.60, 31,824.48 and 20,008.32

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Solution

The fourth proportional to 21,321.60, 31,824.48 and 20,008.32 is: 29,864.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.60 : 31,824.48 = 20,008.32 : x
  2. Step 2: Convert to fraction form
    21,321.60/31,824.48 = 20,008.32/x
  3. Step 3: Cross multiply
    21,321.60x = 31,824.48 × 20,008.32
  4. Step 4: Simplify right side
    21,321.60x = 636,754,379.67
  5. Step 5: Solve for x
    x = 636,754,379.67/21,321.60
  6. Step 6: Final answer
    x = 29,864.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.