Home / 15,928.88-21,908.76-12,778.16

Finding the Fourth Proportional to 15,928.88, 21,908.76 and 12,778.16

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Solution

The fourth proportional to 15,928.88, 21,908.76 and 12,778.16 is: 17,575.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.88 : 21,908.76 = 12,778.16 : x
  2. Step 2: Convert to fraction form
    15,928.88/21,908.76 = 12,778.16/x
  3. Step 3: Cross multiply
    15,928.88x = 21,908.76 × 12,778.16
  4. Step 4: Simplify right side
    15,928.88x = 279,953,640.68
  5. Step 5: Solve for x
    x = 279,953,640.68/15,928.88
  6. Step 6: Final answer
    x = 17,575.22

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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.