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Finding the Fourth Proportional to 18,758.16, 28,277.76 and 17,489.76

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Solution

The fourth proportional to 18,758.16, 28,277.76 and 17,489.76 is: 26,365.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.16 : 28,277.76 = 17,489.76 : x
  2. Step 2: Convert to fraction form
    18,758.16/28,277.76 = 17,489.76/x
  3. Step 3: Cross multiply
    18,758.16x = 28,277.76 × 17,489.76
  4. Step 4: Simplify right side
    18,758.16x = 494,571,235.74
  5. Step 5: Solve for x
    x = 494,571,235.74/18,758.16
  6. Step 6: Final answer
    x = 26,365.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.