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Finding the Fourth Proportional to 11,203.70, 16,805.55 and 10,358.90

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Solution

The fourth proportional to 11,203.70, 16,805.55 and 10,358.90 is: 15,538.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,203.70 : 16,805.55 = 10,358.90 : x
  2. Step 2: Convert to fraction form
    11,203.70/16,805.55 = 10,358.90/x
  3. Step 3: Cross multiply
    11,203.70x = 16,805.55 × 10,358.90
  4. Step 4: Simplify right side
    11,203.70x = 174,087,011.90
  5. Step 5: Solve for x
    x = 174,087,011.90/11,203.70
  6. Step 6: Final answer
    x = 15,538.35

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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.