Home / 13,154.89-18,158.95-8,121.15

Finding the Fourth Proportional to 13,154.89, 18,158.95 and 8,121.15

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Solution

The fourth proportional to 13,154.89, 18,158.95 and 8,121.15 is: 11,210.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,154.89 : 18,158.95 = 8,121.15 : x
  2. Step 2: Convert to fraction form
    13,154.89/18,158.95 = 8,121.15/x
  3. Step 3: Cross multiply
    13,154.89x = 18,158.95 × 8,121.15
  4. Step 4: Simplify right side
    13,154.89x = 147,471,556.79
  5. Step 5: Solve for x
    x = 147,471,556.79/13,154.89
  6. Step 6: Final answer
    x = 11,210.40

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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.