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Finding the Fourth Proportional to 36,280.80, 54,430.80 and 12,904.80

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Solution

The fourth proportional to 36,280.80, 54,430.80 and 12,904.80 is: 19,360.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,280.80 : 54,430.80 = 12,904.80 : x
  2. Step 2: Convert to fraction form
    36,280.80/54,430.80 = 12,904.80/x
  3. Step 3: Cross multiply
    36,280.80x = 54,430.80 × 12,904.80
  4. Step 4: Simplify right side
    36,280.80x = 702,418,587.84
  5. Step 5: Solve for x
    x = 702,418,587.84/36,280.80
  6. Step 6: Final answer
    x = 19,360.61

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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.