Home / 15,684.31-21,654.30-9,719.47

Finding the Fourth Proportional to 15,684.31, 21,654.30 and 9,719.47

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Solution

The fourth proportional to 15,684.31, 21,654.30 and 9,719.47 is: 13,419.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,684.31 : 21,654.30 = 9,719.47 : x
  2. Step 2: Convert to fraction form
    15,684.31/21,654.30 = 9,719.47/x
  3. Step 3: Cross multiply
    15,684.31x = 21,654.30 × 9,719.47
  4. Step 4: Simplify right side
    15,684.31x = 210,468,319.22
  5. Step 5: Solve for x
    x = 210,468,319.22/15,684.31
  6. Step 6: Final answer
    x = 13,419.04

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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.