Home / 20,953.68-28,915.66-11,393.76

Finding the Fourth Proportional to 20,953.68, 28,915.66 and 11,393.76

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Solution

The fourth proportional to 20,953.68, 28,915.66 and 11,393.76 is: 15,723.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.68 : 28,915.66 = 11,393.76 : x
  2. Step 2: Convert to fraction form
    20,953.68/28,915.66 = 11,393.76/x
  3. Step 3: Cross multiply
    20,953.68x = 28,915.66 × 11,393.76
  4. Step 4: Simplify right side
    20,953.68x = 329,458,033.31
  5. Step 5: Solve for x
    x = 329,458,033.31/20,953.68
  6. Step 6: Final answer
    x = 15,723.16

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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.