Home / 15,945.75-22,011.08-11,978.33

Finding the Fourth Proportional to 15,945.75, 22,011.08 and 11,978.33

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Solution

The fourth proportional to 15,945.75, 22,011.08 and 11,978.33 is: 16,534.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,945.75 : 22,011.08 = 11,978.33 : x
  2. Step 2: Convert to fraction form
    15,945.75/22,011.08 = 11,978.33/x
  3. Step 3: Cross multiply
    15,945.75x = 22,011.08 × 11,978.33
  4. Step 4: Simplify right side
    15,945.75x = 263,655,809.95
  5. Step 5: Solve for x
    x = 263,655,809.95/15,945.75
  6. Step 6: Final answer
    x = 16,534.55

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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.