Home / 15,431.04-21,294.09-8,716.55

Finding the Fourth Proportional to 15,431.04, 21,294.09 and 8,716.55

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Solution

The fourth proportional to 15,431.04, 21,294.09 and 8,716.55 is: 12,028.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.04 : 21,294.09 = 8,716.55 : x
  2. Step 2: Convert to fraction form
    15,431.04/21,294.09 = 8,716.55/x
  3. Step 3: Cross multiply
    15,431.04x = 21,294.09 × 8,716.55
  4. Step 4: Simplify right side
    15,431.04x = 185,610,893.72
  5. Step 5: Solve for x
    x = 185,610,893.72/15,431.04
  6. Step 6: Final answer
    x = 12,028.41

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.