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Finding the Fourth Proportional to 28,402.65, 42,603.98 and 11,760.39

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Solution

The fourth proportional to 28,402.65, 42,603.98 and 11,760.39 is: 17,640.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,402.65 : 42,603.98 = 11,760.39 : x
  2. Step 2: Convert to fraction form
    28,402.65/42,603.98 = 11,760.39/x
  3. Step 3: Cross multiply
    28,402.65x = 42,603.98 × 11,760.39
  4. Step 4: Simplify right side
    28,402.65x = 501,039,361.55
  5. Step 5: Solve for x
    x = 501,039,361.55/28,402.65
  6. Step 6: Final answer
    x = 17,640.59

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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.