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Finding the Fourth Proportional to 28,009.78, 42,015.02 and 8,288.76

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Solution

The fourth proportional to 28,009.78, 42,015.02 and 8,288.76 is: 12,433.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,009.78 : 42,015.02 = 8,288.76 : x
  2. Step 2: Convert to fraction form
    28,009.78/42,015.02 = 8,288.76/x
  3. Step 3: Cross multiply
    28,009.78x = 42,015.02 × 8,288.76
  4. Step 4: Simplify right side
    28,009.78x = 348,252,417.18
  5. Step 5: Solve for x
    x = 348,252,417.18/28,009.78
  6. Step 6: Final answer
    x = 12,433.24

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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.