Home / 9,108.12-12,569.40-5,129.76

Finding the Fourth Proportional to 9,108.12, 12,569.40 and 5,129.76

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Solution

The fourth proportional to 9,108.12, 12,569.40 and 5,129.76 is: 7,079.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,108.12 : 12,569.40 = 5,129.76 : x
  2. Step 2: Convert to fraction form
    9,108.12/12,569.40 = 5,129.76/x
  3. Step 3: Cross multiply
    9,108.12x = 12,569.40 × 5,129.76
  4. Step 4: Simplify right side
    9,108.12x = 64,478,005.34
  5. Step 5: Solve for x
    x = 64,478,005.34/9,108.12
  6. Step 6: Final answer
    x = 7,079.18

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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.