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Finding the Fourth Proportional to 18,707.72, 28,058.26 and 6,859

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Solution

The fourth proportional to 18,707.72, 28,058.26 and 6,859 is: 10,287.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,707.72 : 28,058.26 = 6,859 : x
  2. Step 2: Convert to fraction form
    18,707.72/28,058.26 = 6,859/x
  3. Step 3: Cross multiply
    18,707.72x = 28,058.26 × 6,859
  4. Step 4: Simplify right side
    18,707.72x = 192,451,605.34
  5. Step 5: Solve for x
    x = 192,451,605.34/18,707.72
  6. Step 6: Final answer
    x = 10,287.28

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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.