Home / 20,756.16-28,643.40-11,324.64

Finding the Fourth Proportional to 20,756.16, 28,643.40 and 11,324.64

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Solution

The fourth proportional to 20,756.16, 28,643.40 and 11,324.64 is: 15,627.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.16 : 28,643.40 = 11,324.64 : x
  2. Step 2: Convert to fraction form
    20,756.16/28,643.40 = 11,324.64/x
  3. Step 3: Cross multiply
    20,756.16x = 28,643.40 × 11,324.64
  4. Step 4: Simplify right side
    20,756.16x = 324,376,193.38
  5. Step 5: Solve for x
    x = 324,376,193.38/20,756.16
  6. Step 6: Final answer
    x = 15,627.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.