Home / 9,912.38-13,680.29-5,720.63

Finding the Fourth Proportional to 9,912.38, 13,680.29 and 5,720.63

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Solution

The fourth proportional to 9,912.38, 13,680.29 and 5,720.63 is: 7,895.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,912.38 : 13,680.29 = 5,720.63 : x
  2. Step 2: Convert to fraction form
    9,912.38/13,680.29 = 5,720.63/x
  3. Step 3: Cross multiply
    9,912.38x = 13,680.29 × 5,720.63
  4. Step 4: Simplify right side
    9,912.38x = 78,259,823.28
  5. Step 5: Solve for x
    x = 78,259,823.28/9,912.38
  6. Step 6: Final answer
    x = 7,895.16

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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.