Home / 12,815.71-19,223.40-10,619.84

Finding the Fourth Proportional to 12,815.71, 19,223.40 and 10,619.84

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Solution

The fourth proportional to 12,815.71, 19,223.40 and 10,619.84 is: 15,929.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.71 : 19,223.40 = 10,619.84 : x
  2. Step 2: Convert to fraction form
    12,815.71/19,223.40 = 10,619.84/x
  3. Step 3: Cross multiply
    12,815.71x = 19,223.40 × 10,619.84
  4. Step 4: Simplify right side
    12,815.71x = 204,149,432.26
  5. Step 5: Solve for x
    x = 204,149,432.26/12,815.71
  6. Step 6: Final answer
    x = 15,929.62

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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.