Home / 28,255.72-38,996.24-15,681.28

Finding the Fourth Proportional to 28,255.72, 38,996.24 and 15,681.28

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Solution

The fourth proportional to 28,255.72, 38,996.24 and 15,681.28 is: 21,642.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,255.72 : 38,996.24 = 15,681.28 : x
  2. Step 2: Convert to fraction form
    28,255.72/38,996.24 = 15,681.28/x
  3. Step 3: Cross multiply
    28,255.72x = 38,996.24 × 15,681.28
  4. Step 4: Simplify right side
    28,255.72x = 611,510,958.39
  5. Step 5: Solve for x
    x = 611,510,958.39/28,255.72
  6. Step 6: Final answer
    x = 21,642.02

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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.