Home / 9,157.45-12,637.20-5,178.70

Finding the Fourth Proportional to 9,157.45, 12,637.20 and 5,178.70

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Solution

The fourth proportional to 9,157.45, 12,637.20 and 5,178.70 is: 7,146.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,157.45 : 12,637.20 = 5,178.70 : x
  2. Step 2: Convert to fraction form
    9,157.45/12,637.20 = 5,178.70/x
  3. Step 3: Cross multiply
    9,157.45x = 12,637.20 × 5,178.70
  4. Step 4: Simplify right side
    9,157.45x = 65,444,178.56
  5. Step 5: Solve for x
    x = 65,444,178.56/9,157.45
  6. Step 6: Final answer
    x = 7,146.55

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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.