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Finding the Fourth Proportional to 7,138.50, 10,708.41 and 1,874.22

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Solution

The fourth proportional to 7,138.50, 10,708.41 and 1,874.22 is: 2,811.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.50 : 10,708.41 = 1,874.22 : x
  2. Step 2: Convert to fraction form
    7,138.50/10,708.41 = 1,874.22/x
  3. Step 3: Cross multiply
    7,138.50x = 10,708.41 × 1,874.22
  4. Step 4: Simplify right side
    7,138.50x = 20,069,916.19
  5. Step 5: Solve for x
    x = 20,069,916.19/7,138.50
  6. Step 6: Final answer
    x = 2,811.50

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Half scale
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Double scale
Find fourth proportional to 7,139.50, 10,709.91 and 1,875.22
Similar ratio
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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.