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Finding the Fourth Proportional to 18,842.80, 28,259.88 and 5,695.12

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Solution

The fourth proportional to 18,842.80, 28,259.88 and 5,695.12 is: 8,541.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,842.80 : 28,259.88 = 5,695.12 : x
  2. Step 2: Convert to fraction form
    18,842.80/28,259.88 = 5,695.12/x
  3. Step 3: Cross multiply
    18,842.80x = 28,259.88 × 5,695.12
  4. Step 4: Simplify right side
    18,842.80x = 160,943,407.79
  5. Step 5: Solve for x
    x = 160,943,407.79/18,842.80
  6. Step 6: Final answer
    x = 8,541.37

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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.