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Finding the Fourth Proportional to 13,302.99, 18,358.11 and 7,638.10

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Solution

The fourth proportional to 13,302.99, 18,358.11 and 7,638.10 is: 10,540.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,302.99 : 18,358.11 = 7,638.10 : x
  2. Step 2: Convert to fraction form
    13,302.99/18,358.11 = 7,638.10/x
  3. Step 3: Cross multiply
    13,302.99x = 18,358.11 × 7,638.10
  4. Step 4: Simplify right side
    13,302.99x = 140,221,079.99
  5. Step 5: Solve for x
    x = 140,221,079.99/13,302.99
  6. Step 6: Final answer
    x = 10,540.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.