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Finding the Fourth Proportional to 10,138.49, 15,206.54 and 3,118.49

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Solution

The fourth proportional to 10,138.49, 15,206.54 and 3,118.49 is: 4,677.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,138.49 : 15,206.54 = 3,118.49 : x
  2. Step 2: Convert to fraction form
    10,138.49/15,206.54 = 3,118.49/x
  3. Step 3: Cross multiply
    10,138.49x = 15,206.54 × 3,118.49
  4. Step 4: Simplify right side
    10,138.49x = 47,421,408.32
  5. Step 5: Solve for x
    x = 47,421,408.32/10,138.49
  6. Step 6: Final answer
    x = 4,677.36

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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.