Home / 15,456.25-21,314.10-13,749.45

Finding the Fourth Proportional to 15,456.25, 21,314.10 and 13,749.45

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Solution

The fourth proportional to 15,456.25, 21,314.10 and 13,749.45 is: 18,960.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,456.25 : 21,314.10 = 13,749.45 : x
  2. Step 2: Convert to fraction form
    15,456.25/21,314.10 = 13,749.45/x
  3. Step 3: Cross multiply
    15,456.25x = 21,314.10 × 13,749.45
  4. Step 4: Simplify right side
    15,456.25x = 293,057,152.25
  5. Step 5: Solve for x
    x = 293,057,152.25/15,456.25
  6. Step 6: Final answer
    x = 18,960.43

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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.