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Finding the Fourth Proportional to 27,280.80, 40,888.80 and 11,485.80

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Solution

The fourth proportional to 27,280.80, 40,888.80 and 11,485.80 is: 17,215.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,280.80 : 40,888.80 = 11,485.80 : x
  2. Step 2: Convert to fraction form
    27,280.80/40,888.80 = 11,485.80/x
  3. Step 3: Cross multiply
    27,280.80x = 40,888.80 × 11,485.80
  4. Step 4: Simplify right side
    27,280.80x = 469,640,579.04
  5. Step 5: Solve for x
    x = 469,640,579.04/27,280.80
  6. Step 6: Final answer
    x = 17,215.06

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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.