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Finding the Fourth Proportional to 19,806.80, 29,699.46 and 8,700.48

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Solution

The fourth proportional to 19,806.80, 29,699.46 and 8,700.48 is: 13,046.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,806.80 : 29,699.46 = 8,700.48 : x
  2. Step 2: Convert to fraction form
    19,806.80/29,699.46 = 8,700.48/x
  3. Step 3: Cross multiply
    19,806.80x = 29,699.46 × 8,700.48
  4. Step 4: Simplify right side
    19,806.80x = 258,399,557.74
  5. Step 5: Solve for x
    x = 258,399,557.74/19,806.80
  6. Step 6: Final answer
    x = 13,046.01

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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.