Home / 28,231.66-38,959.74-15,656.41

Finding the Fourth Proportional to 28,231.66, 38,959.74 and 15,656.41

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Solution

The fourth proportional to 28,231.66, 38,959.74 and 15,656.41 is: 21,605.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,231.66 : 38,959.74 = 15,656.41 : x
  2. Step 2: Convert to fraction form
    28,231.66/38,959.74 = 15,656.41/x
  3. Step 3: Cross multiply
    28,231.66x = 38,959.74 × 15,656.41
  4. Step 4: Simplify right side
    28,231.66x = 609,969,662.93
  5. Step 5: Solve for x
    x = 609,969,662.93/28,231.66
  6. Step 6: Final answer
    x = 21,605.87

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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.