Home / 4,120.81-5,687.78-2,547.98

Finding the Fourth Proportional to 4,120.81, 5,687.78 and 2,547.98

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Solution

The fourth proportional to 4,120.81, 5,687.78 and 2,547.98 is: 3,516.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,120.81 : 5,687.78 = 2,547.98 : x
  2. Step 2: Convert to fraction form
    4,120.81/5,687.78 = 2,547.98/x
  3. Step 3: Cross multiply
    4,120.81x = 5,687.78 × 2,547.98
  4. Step 4: Simplify right side
    4,120.81x = 14,492,349.68
  5. Step 5: Solve for x
    x = 14,492,349.68/4,120.81
  6. Step 6: Final answer
    x = 3,516.87

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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.