Home / 15,433.25-21,299.19-8,720.11

Finding the Fourth Proportional to 15,433.25, 21,299.19 and 8,720.11

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Solution

The fourth proportional to 15,433.25, 21,299.19 and 8,720.11 is: 12,034.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,433.25 : 21,299.19 = 8,720.11 : x
  2. Step 2: Convert to fraction form
    15,433.25/21,299.19 = 8,720.11/x
  3. Step 3: Cross multiply
    15,433.25x = 21,299.19 × 8,720.11
  4. Step 4: Simplify right side
    15,433.25x = 185,731,279.71
  5. Step 5: Solve for x
    x = 185,731,279.71/15,433.25
  6. Step 6: Final answer
    x = 12,034.49

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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.