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Finding the Fourth Proportional to 8,075.70, 12,113.55 and 4,139.10

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Solution

The fourth proportional to 8,075.70, 12,113.55 and 4,139.10 is: 6,208.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,075.70 : 12,113.55 = 4,139.10 : x
  2. Step 2: Convert to fraction form
    8,075.70/12,113.55 = 4,139.10/x
  3. Step 3: Cross multiply
    8,075.70x = 12,113.55 × 4,139.10
  4. Step 4: Simplify right side
    8,075.70x = 50,139,194.81
  5. Step 5: Solve for x
    x = 50,139,194.81/8,075.70
  6. Step 6: Final answer
    x = 6,208.65

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Half scale
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Double scale
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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.