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Finding the Fourth Proportional to 27,208.80, 40,762.80 and 15,487.20

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Solution

The fourth proportional to 27,208.80, 40,762.80 and 15,487.20 is: 23,202.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,208.80 : 40,762.80 = 15,487.20 : x
  2. Step 2: Convert to fraction form
    27,208.80/40,762.80 = 15,487.20/x
  3. Step 3: Cross multiply
    27,208.80x = 40,762.80 × 15,487.20
  4. Step 4: Simplify right side
    27,208.80x = 631,301,636.16
  5. Step 5: Solve for x
    x = 631,301,636.16/27,208.80
  6. Step 6: Final answer
    x = 23,202.11

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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.