Home / 21,979.07-30,331.18-11,907.46

Finding the Fourth Proportional to 21,979.07, 30,331.18 and 11,907.46

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Solution

The fourth proportional to 21,979.07, 30,331.18 and 11,907.46 is: 16,432.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.07 : 30,331.18 = 11,907.46 : x
  2. Step 2: Convert to fraction form
    21,979.07/30,331.18 = 11,907.46/x
  3. Step 3: Cross multiply
    21,979.07x = 30,331.18 × 11,907.46
  4. Step 4: Simplify right side
    21,979.07x = 361,167,312.60
  5. Step 5: Solve for x
    x = 361,167,312.60/21,979.07
  6. Step 6: Final answer
    x = 16,432.33

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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.