Home / 9,135.91-12,607.28-5,157.39

Finding the Fourth Proportional to 9,135.91, 12,607.28 and 5,157.39

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Solution

The fourth proportional to 9,135.91, 12,607.28 and 5,157.39 is: 7,117.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,135.91 : 12,607.28 = 5,157.39 : x
  2. Step 2: Convert to fraction form
    9,135.91/12,607.28 = 5,157.39/x
  3. Step 3: Cross multiply
    9,135.91x = 12,607.28 × 5,157.39
  4. Step 4: Simplify right side
    9,135.91x = 65,020,659.80
  5. Step 5: Solve for x
    x = 65,020,659.80/9,135.91
  6. Step 6: Final answer
    x = 7,117.05

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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.