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Finding the Fourth Proportional to 28,288, 42,133.20 and 26,807.68

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Solution

The fourth proportional to 28,288, 42,133.20 and 26,807.68 is: 39,928.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,288 : 42,133.20 = 26,807.68 : x
  2. Step 2: Convert to fraction form
    28,288/42,133.20 = 26,807.68/x
  3. Step 3: Cross multiply
    28,288x = 42,133.20 × 26,807.68
  4. Step 4: Simplify right side
    28,288x = 1,129,493,342.98
  5. Step 5: Solve for x
    x = 1,129,493,342.98/28,288
  6. Step 6: Final answer
    x = 39,928.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.