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Finding the Fourth Proportional to 5,138.64, 7,079.03 and 4,888.50

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Solution

The fourth proportional to 5,138.64, 7,079.03 and 4,888.50 is: 6,734.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.64 : 7,079.03 = 4,888.50 : x
  2. Step 2: Convert to fraction form
    5,138.64/7,079.03 = 4,888.50/x
  3. Step 3: Cross multiply
    5,138.64x = 7,079.03 × 4,888.50
  4. Step 4: Simplify right side
    5,138.64x = 34,605,813.71
  5. Step 5: Solve for x
    x = 34,605,813.71/5,138.64
  6. Step 6: Final answer
    x = 6,734.43

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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.