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Finding the Fourth Proportional to 18,890.79, 26,062.97 and 10,930.11

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Solution

The fourth proportional to 18,890.79, 26,062.97 and 10,930.11 is: 15,079.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,890.79 : 26,062.97 = 10,930.11 : x
  2. Step 2: Convert to fraction form
    18,890.79/26,062.97 = 10,930.11/x
  3. Step 3: Cross multiply
    18,890.79x = 26,062.97 × 10,930.11
  4. Step 4: Simplify right side
    18,890.79x = 284,871,074.38
  5. Step 5: Solve for x
    x = 284,871,074.38/18,890.79
  6. Step 6: Final answer
    x = 15,079.89

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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.