Home / 21,180.90-31,774.28-7,144.95

Finding the Fourth Proportional to 21,180.90, 31,774.28 and 7,144.95

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Solution

The fourth proportional to 21,180.90, 31,774.28 and 7,144.95 is: 10,718.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.90 : 31,774.28 = 7,144.95 : x
  2. Step 2: Convert to fraction form
    21,180.90/31,774.28 = 7,144.95/x
  3. Step 3: Cross multiply
    21,180.90x = 31,774.28 × 7,144.95
  4. Step 4: Simplify right side
    21,180.90x = 227,025,606.16
  5. Step 5: Solve for x
    x = 227,025,606.16/21,180.90
  6. Step 6: Final answer
    x = 10,718.41

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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.