Home / 28,111.72-38,793.78-15,536.20

Finding the Fourth Proportional to 28,111.72, 38,793.78 and 15,536.20

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Solution

The fourth proportional to 28,111.72, 38,793.78 and 15,536.20 is: 21,439.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,111.72 : 38,793.78 = 15,536.20 : x
  2. Step 2: Convert to fraction form
    28,111.72/38,793.78 = 15,536.20/x
  3. Step 3: Cross multiply
    28,111.72x = 38,793.78 × 15,536.20
  4. Step 4: Simplify right side
    28,111.72x = 602,707,924.84
  5. Step 5: Solve for x
    x = 602,707,924.84/28,111.72
  6. Step 6: Final answer
    x = 21,439.74

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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.