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Finding the Fourth Proportional to 19,670.98, 29,491.11 and 13,415.49

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Solution

The fourth proportional to 19,670.98, 29,491.11 and 13,415.49 is: 20,112.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,670.98 : 29,491.11 = 13,415.49 : x
  2. Step 2: Convert to fraction form
    19,670.98/29,491.11 = 13,415.49/x
  3. Step 3: Cross multiply
    19,670.98x = 29,491.11 × 13,415.49
  4. Step 4: Simplify right side
    19,670.98x = 395,637,691.29
  5. Step 5: Solve for x
    x = 395,637,691.29/19,670.98
  6. Step 6: Final answer
    x = 20,112.76

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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.