Home / 21,981.88-32,968.12-7,191.28

Finding the Fourth Proportional to 21,981.88, 32,968.12 and 7,191.28

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Solution

The fourth proportional to 21,981.88, 32,968.12 and 7,191.28 is: 10,785.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.88 : 32,968.12 = 7,191.28 : x
  2. Step 2: Convert to fraction form
    21,981.88/32,968.12 = 7,191.28/x
  3. Step 3: Cross multiply
    21,981.88x = 32,968.12 × 7,191.28
  4. Step 4: Simplify right side
    21,981.88x = 237,082,981.99
  5. Step 5: Solve for x
    x = 237,082,981.99/21,981.88
  6. Step 6: Final answer
    x = 10,785.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.