Home / 28,217.64-38,940.39-15,642.39

Finding the Fourth Proportional to 28,217.64, 38,940.39 and 15,642.39

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Solution

The fourth proportional to 28,217.64, 38,940.39 and 15,642.39 is: 21,586.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,217.64 : 38,940.39 = 15,642.39 : x
  2. Step 2: Convert to fraction form
    28,217.64/38,940.39 = 15,642.39/x
  3. Step 3: Cross multiply
    28,217.64x = 38,940.39 × 15,642.39
  4. Step 4: Simplify right side
    28,217.64x = 609,120,767.13
  5. Step 5: Solve for x
    x = 609,120,767.13/28,217.64
  6. Step 6: Final answer
    x = 21,586.52

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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.