Home / 21,979.95-30,332.34-11,908.35

Finding the Fourth Proportional to 21,979.95, 30,332.34 and 11,908.35

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Solution

The fourth proportional to 21,979.95, 30,332.34 and 11,908.35 is: 16,433.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.95 : 30,332.34 = 11,908.35 : x
  2. Step 2: Convert to fraction form
    21,979.95/30,332.34 = 11,908.35/x
  3. Step 3: Cross multiply
    21,979.95x = 30,332.34 × 11,908.35
  4. Step 4: Simplify right side
    21,979.95x = 361,208,121.04
  5. Step 5: Solve for x
    x = 361,208,121.04/21,979.95
  6. Step 6: Final answer
    x = 16,433.53

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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.