Home / 15,154.95-20,908.42-8,778.06

Finding the Fourth Proportional to 15,154.95, 20,908.42 and 8,778.06

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Solution

The fourth proportional to 15,154.95, 20,908.42 and 8,778.06 is: 12,110.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,154.95 : 20,908.42 = 8,778.06 : x
  2. Step 2: Convert to fraction form
    15,154.95/20,908.42 = 8,778.06/x
  3. Step 3: Cross multiply
    15,154.95x = 20,908.42 × 8,778.06
  4. Step 4: Simplify right side
    15,154.95x = 183,535,365.27
  5. Step 5: Solve for x
    x = 183,535,365.27/15,154.95
  6. Step 6: Final answer
    x = 12,110.59

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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.