Home / 20,723.65-31,117.13-19,870.72

Finding the Fourth Proportional to 20,723.65, 31,117.13 and 19,870.72

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Solution

The fourth proportional to 20,723.65, 31,117.13 and 19,870.72 is: 29,836.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,723.65 : 31,117.13 = 19,870.72 : x
  2. Step 2: Convert to fraction form
    20,723.65/31,117.13 = 19,870.72/x
  3. Step 3: Cross multiply
    20,723.65x = 31,117.13 × 19,870.72
  4. Step 4: Simplify right side
    20,723.65x = 618,319,674.80
  5. Step 5: Solve for x
    x = 618,319,674.80/20,723.65
  6. Step 6: Final answer
    x = 29,836.43

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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.