Home / 20,988.70-31,490.54-9,896.96

Finding the Fourth Proportional to 20,988.70, 31,490.54 and 9,896.96

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Solution

The fourth proportional to 20,988.70, 31,490.54 and 9,896.96 is: 14,848.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.70 : 31,490.54 = 9,896.96 : x
  2. Step 2: Convert to fraction form
    20,988.70/31,490.54 = 9,896.96/x
  3. Step 3: Cross multiply
    20,988.70x = 31,490.54 × 9,896.96
  4. Step 4: Simplify right side
    20,988.70x = 311,660,565.27
  5. Step 5: Solve for x
    x = 311,660,565.27/20,988.70
  6. Step 6: Final answer
    x = 14,848.97

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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.