Home / 21,228.40-31,850.80-6,437.44

Finding the Fourth Proportional to 21,228.40, 31,850.80 and 6,437.44

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Solution

The fourth proportional to 21,228.40, 31,850.80 and 6,437.44 is: 9,658.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.40 : 31,850.80 = 6,437.44 : x
  2. Step 2: Convert to fraction form
    21,228.40/31,850.80 = 6,437.44/x
  3. Step 3: Cross multiply
    21,228.40x = 31,850.80 × 6,437.44
  4. Step 4: Simplify right side
    21,228.40x = 205,037,613.95
  5. Step 5: Solve for x
    x = 205,037,613.95/21,228.40
  6. Step 6: Final answer
    x = 9,658.65

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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.