Home / 30,916.58-42,632.61-18,338.90

Finding the Fourth Proportional to 30,916.58, 42,632.61 and 18,338.90

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Solution

The fourth proportional to 30,916.58, 42,632.61 and 18,338.90 is: 25,288.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,916.58 : 42,632.61 = 18,338.90 : x
  2. Step 2: Convert to fraction form
    30,916.58/42,632.61 = 18,338.90/x
  3. Step 3: Cross multiply
    30,916.58x = 42,632.61 × 18,338.90
  4. Step 4: Simplify right side
    30,916.58x = 781,835,171.53
  5. Step 5: Solve for x
    x = 781,835,171.53/30,916.58
  6. Step 6: Final answer
    x = 25,288.54

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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.