Home / 20,981.11-31,466.86-5,987.95

Finding the Fourth Proportional to 20,981.11, 31,466.86 and 5,987.95

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Solution

The fourth proportional to 20,981.11, 31,466.86 and 5,987.95 is: 8,980.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.11 : 31,466.86 = 5,987.95 : x
  2. Step 2: Convert to fraction form
    20,981.11/31,466.86 = 5,987.95/x
  3. Step 3: Cross multiply
    20,981.11x = 31,466.86 × 5,987.95
  4. Step 4: Simplify right side
    20,981.11x = 188,421,984.34
  5. Step 5: Solve for x
    x = 188,421,984.34/20,981.11
  6. Step 6: Final answer
    x = 8,980.55

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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.