Home / 12,357.72-18,534.42-6,115.68

Finding the Fourth Proportional to 12,357.72, 18,534.42 and 6,115.68

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Solution

The fourth proportional to 12,357.72, 18,534.42 and 6,115.68 is: 9,172.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,357.72 : 18,534.42 = 6,115.68 : x
  2. Step 2: Convert to fraction form
    12,357.72/18,534.42 = 6,115.68/x
  3. Step 3: Cross multiply
    12,357.72x = 18,534.42 × 6,115.68
  4. Step 4: Simplify right side
    12,357.72x = 113,350,581.71
  5. Step 5: Solve for x
    x = 113,350,581.71/12,357.72
  6. Step 6: Final answer
    x = 9,172.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.