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Finding the Fourth Proportional to 28,022.40, 42,020.64 and 8,296.20

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Solution

The fourth proportional to 28,022.40, 42,020.64 and 8,296.20 is: 12,440.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,022.40 : 42,020.64 = 8,296.20 : x
  2. Step 2: Convert to fraction form
    28,022.40/42,020.64 = 8,296.20/x
  3. Step 3: Cross multiply
    28,022.40x = 42,020.64 × 8,296.20
  4. Step 4: Simplify right side
    28,022.40x = 348,611,633.57
  5. Step 5: Solve for x
    x = 348,611,633.57/28,022.40
  6. Step 6: Final answer
    x = 12,440.46

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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.