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Finding the Fourth Proportional to 7,068.74, 10,605.06 and 2,138.40

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Solution

The fourth proportional to 7,068.74, 10,605.06 and 2,138.40 is: 3,208.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,068.74 : 10,605.06 = 2,138.40 : x
  2. Step 2: Convert to fraction form
    7,068.74/10,605.06 = 2,138.40/x
  3. Step 3: Cross multiply
    7,068.74x = 10,605.06 × 2,138.40
  4. Step 4: Simplify right side
    7,068.74x = 22,677,860.30
  5. Step 5: Solve for x
    x = 22,677,860.30/7,068.74
  6. Step 6: Final answer
    x = 3,208.19

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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.