Home / 20,953.81-28,915.77-11,393.56

Finding the Fourth Proportional to 20,953.81, 28,915.77 and 11,393.56

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Solution

The fourth proportional to 20,953.81, 28,915.77 and 11,393.56 is: 15,722.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.81 : 28,915.77 = 11,393.56 : x
  2. Step 2: Convert to fraction form
    20,953.81/28,915.77 = 11,393.56/x
  3. Step 3: Cross multiply
    20,953.81x = 28,915.77 × 11,393.56
  4. Step 4: Simplify right side
    20,953.81x = 329,453,560.44
  5. Step 5: Solve for x
    x = 329,453,560.44/20,953.81
  6. Step 6: Final answer
    x = 15,722.85

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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.