Home / 21,329.20-31,950.60-12,084.40

Finding the Fourth Proportional to 21,329.20, 31,950.60 and 12,084.40

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Solution

The fourth proportional to 21,329.20, 31,950.60 and 12,084.40 is: 18,102.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.20 : 31,950.60 = 12,084.40 : x
  2. Step 2: Convert to fraction form
    21,329.20/31,950.60 = 12,084.40/x
  3. Step 3: Cross multiply
    21,329.20x = 31,950.60 × 12,084.40
  4. Step 4: Simplify right side
    21,329.20x = 386,103,830.64
  5. Step 5: Solve for x
    x = 386,103,830.64/21,329.20
  6. Step 6: Final answer
    x = 18,102.12

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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.