Home / 20,689.80-31,045.50-19,574.52

Finding the Fourth Proportional to 20,689.80, 31,045.50 and 19,574.52

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Solution

The fourth proportional to 20,689.80, 31,045.50 and 19,574.52 is: 29,372.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.80 : 31,045.50 = 19,574.52 : x
  2. Step 2: Convert to fraction form
    20,689.80/31,045.50 = 19,574.52/x
  3. Step 3: Cross multiply
    20,689.80x = 31,045.50 × 19,574.52
  4. Step 4: Simplify right side
    20,689.80x = 607,700,760.66
  5. Step 5: Solve for x
    x = 607,700,760.66/20,689.80
  6. Step 6: Final answer
    x = 29,372.00

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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.