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Finding the Fourth Proportional to 19,165.75, 28,748.63 and 5,314.75

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Solution

The fourth proportional to 19,165.75, 28,748.63 and 5,314.75 is: 7,972.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,165.75 : 28,748.63 = 5,314.75 : x
  2. Step 2: Convert to fraction form
    19,165.75/28,748.63 = 5,314.75/x
  3. Step 3: Cross multiply
    19,165.75x = 28,748.63 × 5,314.75
  4. Step 4: Simplify right side
    19,165.75x = 152,791,781.29
  5. Step 5: Solve for x
    x = 152,791,781.29/19,165.75
  6. Step 6: Final answer
    x = 7,972.13

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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.