Home / 20,817.12-31,214.52-9,116.58

Finding the Fourth Proportional to 20,817.12, 31,214.52 and 9,116.58

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Solution

The fourth proportional to 20,817.12, 31,214.52 and 9,116.58 is: 13,669.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.12 : 31,214.52 = 9,116.58 : x
  2. Step 2: Convert to fraction form
    20,817.12/31,214.52 = 9,116.58/x
  3. Step 3: Cross multiply
    20,817.12x = 31,214.52 × 9,116.58
  4. Step 4: Simplify right side
    20,817.12x = 284,569,668.74
  5. Step 5: Solve for x
    x = 284,569,668.74/20,817.12
  6. Step 6: Final answer
    x = 13,669.98

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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.