Home / 15,456.79-21,314.31-13,226.05

Finding the Fourth Proportional to 15,456.79, 21,314.31 and 13,226.05

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Solution

The fourth proportional to 15,456.79, 21,314.31 and 13,226.05 is: 18,238.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,456.79 : 21,314.31 = 13,226.05 : x
  2. Step 2: Convert to fraction form
    15,456.79/21,314.31 = 13,226.05/x
  3. Step 3: Cross multiply
    15,456.79x = 21,314.31 × 13,226.05
  4. Step 4: Simplify right side
    15,456.79x = 281,904,129.78
  5. Step 5: Solve for x
    x = 281,904,129.78/15,456.79
  6. Step 6: Final answer
    x = 18,238.21

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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.