Home / 20,868.08-31,302.18-5,285.70

Finding the Fourth Proportional to 20,868.08, 31,302.18 and 5,285.70

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Solution

The fourth proportional to 20,868.08, 31,302.18 and 5,285.70 is: 7,928.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.08 : 31,302.18 = 5,285.70 : x
  2. Step 2: Convert to fraction form
    20,868.08/31,302.18 = 5,285.70/x
  3. Step 3: Cross multiply
    20,868.08x = 31,302.18 × 5,285.70
  4. Step 4: Simplify right side
    20,868.08x = 165,453,932.83
  5. Step 5: Solve for x
    x = 165,453,932.83/20,868.08
  6. Step 6: Final answer
    x = 7,928.57

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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.