Home / 15,747.28-21,730.36-8,672.32

Finding the Fourth Proportional to 15,747.28, 21,730.36 and 8,672.32

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Solution

The fourth proportional to 15,747.28, 21,730.36 and 8,672.32 is: 11,967.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,747.28 : 21,730.36 = 8,672.32 : x
  2. Step 2: Convert to fraction form
    15,747.28/21,730.36 = 8,672.32/x
  3. Step 3: Cross multiply
    15,747.28x = 21,730.36 × 8,672.32
  4. Step 4: Simplify right side
    15,747.28x = 188,452,635.64
  5. Step 5: Solve for x
    x = 188,452,635.64/15,747.28
  6. Step 6: Final answer
    x = 11,967.31

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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.