Home / 15,456.75-21,314.79-13,749.95

Finding the Fourth Proportional to 15,456.75, 21,314.79 and 13,749.95

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Solution

The fourth proportional to 15,456.75, 21,314.79 and 13,749.95 is: 18,961.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,456.75 : 21,314.79 = 13,749.95 : x
  2. Step 2: Convert to fraction form
    15,456.75/21,314.79 = 13,749.95/x
  3. Step 3: Cross multiply
    15,456.75x = 21,314.79 × 13,749.95
  4. Step 4: Simplify right side
    15,456.75x = 293,077,296.76
  5. Step 5: Solve for x
    x = 293,077,296.76/15,456.75
  6. Step 6: Final answer
    x = 18,961.12

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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.