Home / 20,474.47-28,256.43-11,521.45

Finding the Fourth Proportional to 20,474.47, 28,256.43 and 11,521.45

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Solution

The fourth proportional to 20,474.47, 28,256.43 and 11,521.45 is: 15,900.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,474.47 : 28,256.43 = 11,521.45 : x
  2. Step 2: Convert to fraction form
    20,474.47/28,256.43 = 11,521.45/x
  3. Step 3: Cross multiply
    20,474.47x = 28,256.43 × 11,521.45
  4. Step 4: Simplify right side
    20,474.47x = 325,555,045.42
  5. Step 5: Solve for x
    x = 325,555,045.42/20,474.47
  6. Step 6: Final answer
    x = 15,900.54

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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.