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Finding the Fourth Proportional to 18,798.22, 28,199.76 and 6,312.88

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Solution

The fourth proportional to 18,798.22, 28,199.76 and 6,312.88 is: 9,470.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,798.22 : 28,199.76 = 6,312.88 : x
  2. Step 2: Convert to fraction form
    18,798.22/28,199.76 = 6,312.88/x
  3. Step 3: Cross multiply
    18,798.22x = 28,199.76 × 6,312.88
  4. Step 4: Simplify right side
    18,798.22x = 178,021,700.91
  5. Step 5: Solve for x
    x = 178,021,700.91/18,798.22
  6. Step 6: Final answer
    x = 9,470.14

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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.