Home / 18,219.55-25,143.08-11,508.18

Finding the Fourth Proportional to 18,219.55, 25,143.08 and 11,508.18

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Solution

The fourth proportional to 18,219.55, 25,143.08 and 11,508.18 is: 15,881.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,219.55 : 25,143.08 = 11,508.18 : x
  2. Step 2: Convert to fraction form
    18,219.55/25,143.08 = 11,508.18/x
  3. Step 3: Cross multiply
    18,219.55x = 25,143.08 × 11,508.18
  4. Step 4: Simplify right side
    18,219.55x = 289,351,032.85
  5. Step 5: Solve for x
    x = 289,351,032.85/18,219.55
  6. Step 6: Final answer
    x = 15,881.35

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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.