Home / 15,900.32-21,964.56-15,122.72

Finding the Fourth Proportional to 15,900.32, 21,964.56 and 15,122.72

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Solution

The fourth proportional to 15,900.32, 21,964.56 and 15,122.72 is: 20,890.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,900.32 : 21,964.56 = 15,122.72 : x
  2. Step 2: Convert to fraction form
    15,900.32/21,964.56 = 15,122.72/x
  3. Step 3: Cross multiply
    15,900.32x = 21,964.56 × 15,122.72
  4. Step 4: Simplify right side
    15,900.32x = 332,163,890.80
  5. Step 5: Solve for x
    x = 332,163,890.80/15,900.32
  6. Step 6: Final answer
    x = 20,890.39

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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.