Home / 7,718.59-11,571-2,787.13

Finding the Fourth Proportional to 7,718.59, 11,571 and 2,787.13

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Solution

The fourth proportional to 7,718.59, 11,571 and 2,787.13 is: 4,178.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,718.59 : 11,571 = 2,787.13 : x
  2. Step 2: Convert to fraction form
    7,718.59/11,571 = 2,787.13/x
  3. Step 3: Cross multiply
    7,718.59x = 11,571 × 2,787.13
  4. Step 4: Simplify right side
    7,718.59x = 32,249,881.23
  5. Step 5: Solve for x
    x = 32,249,881.23/7,718.59
  6. Step 6: Final answer
    x = 4,178.21

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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.