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Finding the Fourth Proportional to 10,528.80, 15,796.80 and 4,687.20

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Solution

The fourth proportional to 10,528.80, 15,796.80 and 4,687.20 is: 7,032.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,528.80 : 15,796.80 = 4,687.20 : x
  2. Step 2: Convert to fraction form
    10,528.80/15,796.80 = 4,687.20/x
  3. Step 3: Cross multiply
    10,528.80x = 15,796.80 × 4,687.20
  4. Step 4: Simplify right side
    10,528.80x = 74,042,760.96
  5. Step 5: Solve for x
    x = 74,042,760.96/10,528.80
  6. Step 6: Final answer
    x = 7,032.40

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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.