Home / 12,388.59-17,110.45-8,158.56

Finding the Fourth Proportional to 12,388.59, 17,110.45 and 8,158.56

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Solution

The fourth proportional to 12,388.59, 17,110.45 and 8,158.56 is: 11,268.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,388.59 : 17,110.45 = 8,158.56 : x
  2. Step 2: Convert to fraction form
    12,388.59/17,110.45 = 8,158.56/x
  3. Step 3: Cross multiply
    12,388.59x = 17,110.45 × 8,158.56
  4. Step 4: Simplify right side
    12,388.59x = 139,596,632.95
  5. Step 5: Solve for x
    x = 139,596,632.95/12,388.59
  6. Step 6: Final answer
    x = 11,268.16

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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.