Home / 30,916.08-42,631.92-18,338.40

Finding the Fourth Proportional to 30,916.08, 42,631.92 and 18,338.40

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Solution

The fourth proportional to 30,916.08, 42,631.92 and 18,338.40 is: 25,287.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,916.08 : 42,631.92 = 18,338.40 : x
  2. Step 2: Convert to fraction form
    30,916.08/42,631.92 = 18,338.40/x
  3. Step 3: Cross multiply
    30,916.08x = 42,631.92 × 18,338.40
  4. Step 4: Simplify right side
    30,916.08x = 781,801,201.73
  5. Step 5: Solve for x
    x = 781,801,201.73/30,916.08
  6. Step 6: Final answer
    x = 25,287.85

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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.