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Finding the Fourth Proportional to 19,866.98, 29,810.73 and 13,208.11

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Solution

The fourth proportional to 19,866.98, 29,810.73 and 13,208.11 is: 19,818.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,866.98 : 29,810.73 = 13,208.11 : x
  2. Step 2: Convert to fraction form
    19,866.98/29,810.73 = 13,208.11/x
  3. Step 3: Cross multiply
    19,866.98x = 29,810.73 × 13,208.11
  4. Step 4: Simplify right side
    19,866.98x = 393,743,401.02
  5. Step 5: Solve for x
    x = 393,743,401.02/19,866.98
  6. Step 6: Final answer
    x = 19,818.99

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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.