Home / 21,707.28-29,955.93-12,147.18

Finding the Fourth Proportional to 21,707.28, 29,955.93 and 12,147.18

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Solution

The fourth proportional to 21,707.28, 29,955.93 and 12,147.18 is: 16,763.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,707.28 : 29,955.93 = 12,147.18 : x
  2. Step 2: Convert to fraction form
    21,707.28/29,955.93 = 12,147.18/x
  3. Step 3: Cross multiply
    21,707.28x = 29,955.93 × 12,147.18
  4. Step 4: Simplify right side
    21,707.28x = 363,880,073.78
  5. Step 5: Solve for x
    x = 363,880,073.78/21,707.28
  6. Step 6: Final answer
    x = 16,763.04

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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.