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Finding the Fourth Proportional to 28,219.84, 42,330.12 and 7,443.16

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Solution

The fourth proportional to 28,219.84, 42,330.12 and 7,443.16 is: 11,164.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,219.84 : 42,330.12 = 7,443.16 : x
  2. Step 2: Convert to fraction form
    28,219.84/42,330.12 = 7,443.16/x
  3. Step 3: Cross multiply
    28,219.84x = 42,330.12 × 7,443.16
  4. Step 4: Simplify right side
    28,219.84x = 315,069,855.98
  5. Step 5: Solve for x
    x = 315,069,855.98/28,219.84
  6. Step 6: Final answer
    x = 11,164.83

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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.