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Finding the Fourth Proportional to 10,608.80, 15,908.40 and 4,762.40

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Solution

The fourth proportional to 10,608.80, 15,908.40 and 4,762.40 is: 7,141.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,608.80 : 15,908.40 = 4,762.40 : x
  2. Step 2: Convert to fraction form
    10,608.80/15,908.40 = 4,762.40/x
  3. Step 3: Cross multiply
    10,608.80x = 15,908.40 × 4,762.40
  4. Step 4: Simplify right side
    10,608.80x = 75,762,164.16
  5. Step 5: Solve for x
    x = 75,762,164.16/10,608.80
  6. Step 6: Final answer
    x = 7,141.45

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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.