Home / 13,787.20-19,007.42-12,386

Finding the Fourth Proportional to 13,787.20, 19,007.42 and 12,386

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Solution

The fourth proportional to 13,787.20, 19,007.42 and 12,386 is: 17,075.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,787.20 : 19,007.42 = 12,386 : x
  2. Step 2: Convert to fraction form
    13,787.20/19,007.42 = 12,386/x
  3. Step 3: Cross multiply
    13,787.20x = 19,007.42 × 12,386
  4. Step 4: Simplify right side
    13,787.20x = 235,425,904.12
  5. Step 5: Solve for x
    x = 235,425,904.12/13,787.20
  6. Step 6: Final answer
    x = 17,075.69

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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.