Home / 20,981.53-31,461.45-6,188.56

Finding the Fourth Proportional to 20,981.53, 31,461.45 and 6,188.56

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Solution

The fourth proportional to 20,981.53, 31,461.45 and 6,188.56 is: 9,279.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.53 : 31,461.45 = 6,188.56 : x
  2. Step 2: Convert to fraction form
    20,981.53/31,461.45 = 6,188.56/x
  3. Step 3: Cross multiply
    20,981.53x = 31,461.45 × 6,188.56
  4. Step 4: Simplify right side
    20,981.53x = 194,701,071.01
  5. Step 5: Solve for x
    x = 194,701,071.01/20,981.53
  6. Step 6: Final answer
    x = 9,279.64

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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.