Home / 9,108.74-12,570.11-5,129.91

Finding the Fourth Proportional to 9,108.74, 12,570.11 and 5,129.91

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Solution

The fourth proportional to 9,108.74, 12,570.11 and 5,129.91 is: 7,079.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,108.74 : 12,570.11 = 5,129.91 : x
  2. Step 2: Convert to fraction form
    9,108.74/12,570.11 = 5,129.91/x
  3. Step 3: Cross multiply
    9,108.74x = 12,570.11 × 5,129.91
  4. Step 4: Simplify right side
    9,108.74x = 64,483,507.34
  5. Step 5: Solve for x
    x = 64,483,507.34/9,108.74
  6. Step 6: Final answer
    x = 7,079.30

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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.