Home / 9,108.40-12,569.62-5,129.50

Finding the Fourth Proportional to 9,108.40, 12,569.62 and 5,129.50

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Solution

The fourth proportional to 9,108.40, 12,569.62 and 5,129.50 is: 7,078.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,108.40 : 12,569.62 = 5,129.50 : x
  2. Step 2: Convert to fraction form
    9,108.40/12,569.62 = 5,129.50/x
  3. Step 3: Cross multiply
    9,108.40x = 12,569.62 × 5,129.50
  4. Step 4: Simplify right side
    9,108.40x = 64,475,865.79
  5. Step 5: Solve for x
    x = 64,475,865.79/9,108.40
  6. Step 6: Final answer
    x = 7,078.73

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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.