Home / 15,725.52-21,693.96-10,138.32

Finding the Fourth Proportional to 15,725.52, 21,693.96 and 10,138.32

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Solution

The fourth proportional to 15,725.52, 21,693.96 and 10,138.32 is: 13,986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,725.52 : 21,693.96 = 10,138.32 : x
  2. Step 2: Convert to fraction form
    15,725.52/21,693.96 = 10,138.32/x
  3. Step 3: Cross multiply
    15,725.52x = 21,693.96 × 10,138.32
  4. Step 4: Simplify right side
    15,725.52x = 219,940,308.55
  5. Step 5: Solve for x
    x = 219,940,308.55/15,725.52
  6. Step 6: Final answer
    x = 13,986.20

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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.