Home / 20,981.48-31,462.80-6,185.20

Finding the Fourth Proportional to 20,981.48, 31,462.80 and 6,185.20

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Solution

The fourth proportional to 20,981.48, 31,462.80 and 6,185.20 is: 9,275.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.48 : 31,462.80 = 6,185.20 : x
  2. Step 2: Convert to fraction form
    20,981.48/31,462.80 = 6,185.20/x
  3. Step 3: Cross multiply
    20,981.48x = 31,462.80 × 6,185.20
  4. Step 4: Simplify right side
    20,981.48x = 194,603,710.56
  5. Step 5: Solve for x
    x = 194,603,710.56/20,981.48
  6. Step 6: Final answer
    x = 9,275.02

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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.