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Finding the Fourth Proportional to 13,287.81, 19,898.91 and 8,342.49

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Solution

The fourth proportional to 13,287.81, 19,898.91 and 8,342.49 is: 12,493.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.81 : 19,898.91 = 8,342.49 : x
  2. Step 2: Convert to fraction form
    13,287.81/19,898.91 = 8,342.49/x
  3. Step 3: Cross multiply
    13,287.81x = 19,898.91 × 8,342.49
  4. Step 4: Simplify right side
    13,287.81x = 166,006,457.69
  5. Step 5: Solve for x
    x = 166,006,457.69/13,287.81
  6. Step 6: Final answer
    x = 12,493.14

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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.