Home / 21,860.88-30,169.44-12,430.32

Finding the Fourth Proportional to 21,860.88, 30,169.44 and 12,430.32

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Solution

The fourth proportional to 21,860.88, 30,169.44 and 12,430.32 is: 17,154.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,860.88 : 30,169.44 = 12,430.32 : x
  2. Step 2: Convert to fraction form
    21,860.88/30,169.44 = 12,430.32/x
  3. Step 3: Cross multiply
    21,860.88x = 30,169.44 × 12,430.32
  4. Step 4: Simplify right side
    21,860.88x = 375,015,793.42
  5. Step 5: Solve for x
    x = 375,015,793.42/21,860.88
  6. Step 6: Final answer
    x = 17,154.65

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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.