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Finding the Fourth Proportional to 14,290.78, 19,721.67 and 8,003.56

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Solution

The fourth proportional to 14,290.78, 19,721.67 and 8,003.56 is: 11,045.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,290.78 : 19,721.67 = 8,003.56 : x
  2. Step 2: Convert to fraction form
    14,290.78/19,721.67 = 8,003.56/x
  3. Step 3: Cross multiply
    14,290.78x = 19,721.67 × 8,003.56
  4. Step 4: Simplify right side
    14,290.78x = 157,843,569.15
  5. Step 5: Solve for x
    x = 157,843,569.15/14,290.78
  6. Step 6: Final answer
    x = 11,045.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.