Home / 21,155.18-31,734.35-7,115.24

Finding the Fourth Proportional to 21,155.18, 31,734.35 and 7,115.24

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Solution

The fourth proportional to 21,155.18, 31,734.35 and 7,115.24 is: 10,673.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.18 : 31,734.35 = 7,115.24 : x
  2. Step 2: Convert to fraction form
    21,155.18/31,734.35 = 7,115.24/x
  3. Step 3: Cross multiply
    21,155.18x = 31,734.35 × 7,115.24
  4. Step 4: Simplify right side
    21,155.18x = 225,797,586.94
  5. Step 5: Solve for x
    x = 225,797,586.94/21,155.18
  6. Step 6: Final answer
    x = 10,673.40

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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.