Home / 15,438.20-21,292.97-13,288.41

Finding the Fourth Proportional to 15,438.20, 21,292.97 and 13,288.41

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Solution

The fourth proportional to 15,438.20, 21,292.97 and 13,288.41 is: 18,327.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.20 : 21,292.97 = 13,288.41 : x
  2. Step 2: Convert to fraction form
    15,438.20/21,292.97 = 13,288.41/x
  3. Step 3: Cross multiply
    15,438.20x = 21,292.97 × 13,288.41
  4. Step 4: Simplify right side
    15,438.20x = 282,949,573.71
  5. Step 5: Solve for x
    x = 282,949,573.71/15,438.20
  6. Step 6: Final answer
    x = 18,327.88

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1.5x scale

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.