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Finding the Fourth Proportional to 13,149.98, 19,693.53 and 7,217.74

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Solution

The fourth proportional to 13,149.98, 19,693.53 and 7,217.74 is: 10,809.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.98 : 19,693.53 = 7,217.74 : x
  2. Step 2: Convert to fraction form
    13,149.98/19,693.53 = 7,217.74/x
  3. Step 3: Cross multiply
    13,149.98x = 19,693.53 × 7,217.74
  4. Step 4: Simplify right side
    13,149.98x = 142,142,803.84
  5. Step 5: Solve for x
    x = 142,142,803.84/13,149.98
  6. Step 6: Final answer
    x = 10,809.36

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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.