Home / 20,834.40-31,255.64-8,988.14

Finding the Fourth Proportional to 20,834.40, 31,255.64 and 8,988.14

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Solution

The fourth proportional to 20,834.40, 31,255.64 and 8,988.14 is: 13,483.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,834.40 : 31,255.64 = 8,988.14 : x
  2. Step 2: Convert to fraction form
    20,834.40/31,255.64 = 8,988.14/x
  3. Step 3: Cross multiply
    20,834.40x = 31,255.64 × 8,988.14
  4. Step 4: Simplify right side
    20,834.40x = 280,930,068.11
  5. Step 5: Solve for x
    x = 280,930,068.11/20,834.40
  6. Step 6: Final answer
    x = 13,483.95

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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.