Home / 12,787.65-19,155.93-10,159.61

Finding the Fourth Proportional to 12,787.65, 19,155.93 and 10,159.61

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Solution

The fourth proportional to 12,787.65, 19,155.93 and 10,159.61 is: 15,219.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.65 : 19,155.93 = 10,159.61 : x
  2. Step 2: Convert to fraction form
    12,787.65/19,155.93 = 10,159.61/x
  3. Step 3: Cross multiply
    12,787.65x = 19,155.93 × 10,159.61
  4. Step 4: Simplify right side
    12,787.65x = 194,616,682.21
  5. Step 5: Solve for x
    x = 194,616,682.21/12,787.65
  6. Step 6: Final answer
    x = 15,219.11

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1.5x scale

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.