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Finding the Fourth Proportional to 18,771.98, 28,158.91 and 5,623.10

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Solution

The fourth proportional to 18,771.98, 28,158.91 and 5,623.10 is: 8,434.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.98 : 28,158.91 = 5,623.10 : x
  2. Step 2: Convert to fraction form
    18,771.98/28,158.91 = 5,623.10/x
  3. Step 3: Cross multiply
    18,771.98x = 28,158.91 × 5,623.10
  4. Step 4: Simplify right side
    18,771.98x = 158,340,338.71
  5. Step 5: Solve for x
    x = 158,340,338.71/18,771.98
  6. Step 6: Final answer
    x = 8,434.93

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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.