Home / 8,741.78-12,075.20-6,477.72

Finding the Fourth Proportional to 8,741.78, 12,075.20 and 6,477.72

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Solution

The fourth proportional to 8,741.78, 12,075.20 and 6,477.72 is: 8,947.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,741.78 : 12,075.20 = 6,477.72 : x
  2. Step 2: Convert to fraction form
    8,741.78/12,075.20 = 6,477.72/x
  3. Step 3: Cross multiply
    8,741.78x = 12,075.20 × 6,477.72
  4. Step 4: Simplify right side
    8,741.78x = 78,219,732.16
  5. Step 5: Solve for x
    x = 78,219,732.16/8,741.78
  6. Step 6: Final answer
    x = 8,947.81

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Double scale
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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.