Home / 20,995.76-29,001.84-15,681.36

Finding the Fourth Proportional to 20,995.76, 29,001.84 and 15,681.36

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Solution

The fourth proportional to 20,995.76, 29,001.84 and 15,681.36 is: 21,660.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.76 : 29,001.84 = 15,681.36 : x
  2. Step 2: Convert to fraction form
    20,995.76/29,001.84 = 15,681.36/x
  3. Step 3: Cross multiply
    20,995.76x = 29,001.84 × 15,681.36
  4. Step 4: Simplify right side
    20,995.76x = 454,788,293.70
  5. Step 5: Solve for x
    x = 454,788,293.70/20,995.76
  6. Step 6: Final answer
    x = 21,660.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.