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Finding the Fourth Proportional to 19,077.70, 28,616.55 and 18,105.70

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Solution

The fourth proportional to 19,077.70, 28,616.55 and 18,105.70 is: 27,158.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,077.70 : 28,616.55 = 18,105.70 : x
  2. Step 2: Convert to fraction form
    19,077.70/28,616.55 = 18,105.70/x
  3. Step 3: Cross multiply
    19,077.70x = 28,616.55 × 18,105.70
  4. Step 4: Simplify right side
    19,077.70x = 518,122,669.34
  5. Step 5: Solve for x
    x = 518,122,669.34/19,077.70
  6. Step 6: Final answer
    x = 27,158.55

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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.