Home / 21,888.88-30,202.68-12,937.84

Finding the Fourth Proportional to 21,888.88, 30,202.68 and 12,937.84

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Solution

The fourth proportional to 21,888.88, 30,202.68 and 12,937.84 is: 17,851.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,888.88 : 30,202.68 = 12,937.84 : x
  2. Step 2: Convert to fraction form
    21,888.88/30,202.68 = 12,937.84/x
  3. Step 3: Cross multiply
    21,888.88x = 30,202.68 × 12,937.84
  4. Step 4: Simplify right side
    21,888.88x = 390,757,441.41
  5. Step 5: Solve for x
    x = 390,757,441.41/21,888.88
  6. Step 6: Final answer
    x = 17,851.87

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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.