Home / 28,787.84-43,186.68-13,206.80

Finding the Fourth Proportional to 28,787.84, 43,186.68 and 13,206.80

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Solution

The fourth proportional to 28,787.84, 43,186.68 and 13,206.80 is: 19,812.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,787.84 : 43,186.68 = 13,206.80 : x
  2. Step 2: Convert to fraction form
    28,787.84/43,186.68 = 13,206.80/x
  3. Step 3: Cross multiply
    28,787.84x = 43,186.68 × 13,206.80
  4. Step 4: Simplify right side
    28,787.84x = 570,357,845.42
  5. Step 5: Solve for x
    x = 570,357,845.42/28,787.84
  6. Step 6: Final answer
    x = 19,812.46

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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.