Home / 20,140.40-30,214.95-7,660.65

Finding the Fourth Proportional to 20,140.40, 30,214.95 and 7,660.65

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Solution

The fourth proportional to 20,140.40, 30,214.95 and 7,660.65 is: 11,492.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.40 : 30,214.95 = 7,660.65 : x
  2. Step 2: Convert to fraction form
    20,140.40/30,214.95 = 7,660.65/x
  3. Step 3: Cross multiply
    20,140.40x = 30,214.95 × 7,660.65
  4. Step 4: Simplify right side
    20,140.40x = 231,466,156.72
  5. Step 5: Solve for x
    x = 231,466,156.72/20,140.40
  6. Step 6: Final answer
    x = 11,492.63

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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.