Home / 21,979.04-30,331.03-11,907.75

Finding the Fourth Proportional to 21,979.04, 30,331.03 and 11,907.75

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Solution

The fourth proportional to 21,979.04, 30,331.03 and 11,907.75 is: 16,432.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.04 : 30,331.03 = 11,907.75 : x
  2. Step 2: Convert to fraction form
    21,979.04/30,331.03 = 11,907.75/x
  3. Step 3: Cross multiply
    21,979.04x = 30,331.03 × 11,907.75
  4. Step 4: Simplify right side
    21,979.04x = 361,174,292.71
  5. Step 5: Solve for x
    x = 361,174,292.71/21,979.04
  6. Step 6: Final answer
    x = 16,432.67

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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.