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Finding the Fourth Proportional to 28,643.94, 42,919.74 and 15,502.50

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Solution

The fourth proportional to 28,643.94, 42,919.74 and 15,502.50 is: 23,228.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,643.94 : 42,919.74 = 15,502.50 : x
  2. Step 2: Convert to fraction form
    28,643.94/42,919.74 = 15,502.50/x
  3. Step 3: Cross multiply
    28,643.94x = 42,919.74 × 15,502.50
  4. Step 4: Simplify right side
    28,643.94x = 665,363,269.35
  5. Step 5: Solve for x
    x = 665,363,269.35/28,643.94
  6. Step 6: Final answer
    x = 23,228.76

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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.