Home / 21,920.20-30,242.48-12,482.08

Finding the Fourth Proportional to 21,920.20, 30,242.48 and 12,482.08

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Solution

The fourth proportional to 21,920.20, 30,242.48 and 12,482.08 is: 17,221.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,920.20 : 30,242.48 = 12,482.08 : x
  2. Step 2: Convert to fraction form
    21,920.20/30,242.48 = 12,482.08/x
  3. Step 3: Cross multiply
    21,920.20x = 30,242.48 × 12,482.08
  4. Step 4: Simplify right side
    21,920.20x = 377,489,054.76
  5. Step 5: Solve for x
    x = 377,489,054.76/21,920.20
  6. Step 6: Final answer
    x = 17,221.06

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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.