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Finding the Fourth Proportional to 28,662.66, 42,986.70 and 11,122.92

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Solution

The fourth proportional to 28,662.66, 42,986.70 and 11,122.92 is: 16,681.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,662.66 : 42,986.70 = 11,122.92 : x
  2. Step 2: Convert to fraction form
    28,662.66/42,986.70 = 11,122.92/x
  3. Step 3: Cross multiply
    28,662.66x = 42,986.70 × 11,122.92
  4. Step 4: Simplify right side
    28,662.66x = 478,137,625.16
  5. Step 5: Solve for x
    x = 478,137,625.16/28,662.66
  6. Step 6: Final answer
    x = 16,681.55

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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.