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Finding the Fourth Proportional to 15,763.28, 21,751.28 and 9,049.20

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Solution

The fourth proportional to 15,763.28, 21,751.28 and 9,049.20 is: 12,486.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,763.28 : 21,751.28 = 9,049.20 : x
  2. Step 2: Convert to fraction form
    15,763.28/21,751.28 = 9,049.20/x
  3. Step 3: Cross multiply
    15,763.28x = 21,751.28 × 9,049.20
  4. Step 4: Simplify right side
    15,763.28x = 196,831,682.98
  5. Step 5: Solve for x
    x = 196,831,682.98/15,763.28
  6. Step 6: Final answer
    x = 12,486.72

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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.