Home / 21,229.65-31,814.29-15,639.03

Finding the Fourth Proportional to 21,229.65, 31,814.29 and 15,639.03

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Solution

The fourth proportional to 21,229.65, 31,814.29 and 15,639.03 is: 23,436.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,229.65 : 31,814.29 = 15,639.03 : x
  2. Step 2: Convert to fraction form
    21,229.65/31,814.29 = 15,639.03/x
  3. Step 3: Cross multiply
    21,229.65x = 31,814.29 × 15,639.03
  4. Step 4: Simplify right side
    21,229.65x = 497,544,635.74
  5. Step 5: Solve for x
    x = 497,544,635.74/21,229.65
  6. Step 6: Final answer
    x = 23,436.31

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1.5x scale

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.