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Finding the Fourth Proportional to 28,404.74, 42,626.07 and 9,936.74

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Solution

The fourth proportional to 28,404.74, 42,626.07 and 9,936.74 is: 14,911.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,404.74 : 42,626.07 = 9,936.74 : x
  2. Step 2: Convert to fraction form
    28,404.74/42,626.07 = 9,936.74/x
  3. Step 3: Cross multiply
    28,404.74x = 42,626.07 × 9,936.74
  4. Step 4: Simplify right side
    28,404.74x = 423,564,174.81
  5. Step 5: Solve for x
    x = 423,564,174.81/28,404.74
  6. Step 6: Final answer
    x = 14,911.74

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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.