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Finding the Fourth Proportional to 4,877.71, 6,731.20 and 2,639.54

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Solution

The fourth proportional to 4,877.71, 6,731.20 and 2,639.54 is: 3,642.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,877.71 : 6,731.20 = 2,639.54 : x
  2. Step 2: Convert to fraction form
    4,877.71/6,731.20 = 2,639.54/x
  3. Step 3: Cross multiply
    4,877.71x = 6,731.20 × 2,639.54
  4. Step 4: Simplify right side
    4,877.71x = 17,767,271.65
  5. Step 5: Solve for x
    x = 17,767,271.65/4,877.71
  6. Step 6: Final answer
    x = 3,642.54

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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.