Home / 9,115.34-12,580.11-5,580.90

Finding the Fourth Proportional to 9,115.34, 12,580.11 and 5,580.90

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Solution

The fourth proportional to 9,115.34, 12,580.11 and 5,580.90 is: 7,702.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.34 : 12,580.11 = 5,580.90 : x
  2. Step 2: Convert to fraction form
    9,115.34/12,580.11 = 5,580.90/x
  3. Step 3: Cross multiply
    9,115.34x = 12,580.11 × 5,580.90
  4. Step 4: Simplify right side
    9,115.34x = 70,208,335.90
  5. Step 5: Solve for x
    x = 70,208,335.90/9,115.34
  6. Step 6: Final answer
    x = 7,702.22

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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.