Home / 30,916.18-42,660.45-18,338.50

Finding the Fourth Proportional to 30,916.18, 42,660.45 and 18,338.50

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Solution

The fourth proportional to 30,916.18, 42,660.45 and 18,338.50 is: 25,304.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,916.18 : 42,660.45 = 18,338.50 : x
  2. Step 2: Convert to fraction form
    30,916.18/42,660.45 = 18,338.50/x
  3. Step 3: Cross multiply
    30,916.18x = 42,660.45 × 18,338.50
  4. Step 4: Simplify right side
    30,916.18x = 782,328,662.33
  5. Step 5: Solve for x
    x = 782,328,662.33/30,916.18
  6. Step 6: Final answer
    x = 25,304.83

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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.