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Finding the Fourth Proportional to 5,138.70, 7,103.07 and 4,730.46

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Solution

The fourth proportional to 5,138.70, 7,103.07 and 4,730.46 is: 6,538.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.70 : 7,103.07 = 4,730.46 : x
  2. Step 2: Convert to fraction form
    5,138.70/7,103.07 = 4,730.46/x
  3. Step 3: Cross multiply
    5,138.70x = 7,103.07 × 4,730.46
  4. Step 4: Simplify right side
    5,138.70x = 33,600,788.51
  5. Step 5: Solve for x
    x = 33,600,788.51/5,138.70
  6. Step 6: Final answer
    x = 6,538.77

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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.