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Finding the Fourth Proportional to 13,553.30, 18,703 and 7,888.22

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Solution

The fourth proportional to 13,553.30, 18,703 and 7,888.22 is: 10,885.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,553.30 : 18,703 = 7,888.22 : x
  2. Step 2: Convert to fraction form
    13,553.30/18,703 = 7,888.22/x
  3. Step 3: Cross multiply
    13,553.30x = 18,703 × 7,888.22
  4. Step 4: Simplify right side
    13,553.30x = 147,533,378.66
  5. Step 5: Solve for x
    x = 147,533,378.66/13,553.30
  6. Step 6: Final answer
    x = 10,885.42

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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.