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Finding the Fourth Proportional to 18,930.24, 26,123.82 and 10,977.12

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Solution

The fourth proportional to 18,930.24, 26,123.82 and 10,977.12 is: 15,148.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.24 : 26,123.82 = 10,977.12 : x
  2. Step 2: Convert to fraction form
    18,930.24/26,123.82 = 10,977.12/x
  3. Step 3: Cross multiply
    18,930.24x = 26,123.82 × 10,977.12
  4. Step 4: Simplify right side
    18,930.24x = 286,764,307.00
  5. Step 5: Solve for x
    x = 286,764,307.00/18,930.24
  6. Step 6: Final answer
    x = 15,148.48

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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.