Home / 21,930.30-32,903.55-7,139.70

Finding the Fourth Proportional to 21,930.30, 32,903.55 and 7,139.70

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Solution

The fourth proportional to 21,930.30, 32,903.55 and 7,139.70 is: 10,712.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,930.30 : 32,903.55 = 7,139.70 : x
  2. Step 2: Convert to fraction form
    21,930.30/32,903.55 = 7,139.70/x
  3. Step 3: Cross multiply
    21,930.30x = 32,903.55 × 7,139.70
  4. Step 4: Simplify right side
    21,930.30x = 234,921,475.94
  5. Step 5: Solve for x
    x = 234,921,475.94/21,930.30
  6. Step 6: Final answer
    x = 10,712.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.