Home / 15,356.28-21,193.71-11,388.72

Finding the Fourth Proportional to 15,356.28, 21,193.71 and 11,388.72

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Solution

The fourth proportional to 15,356.28, 21,193.71 and 11,388.72 is: 15,717.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,356.28 : 21,193.71 = 11,388.72 : x
  2. Step 2: Convert to fraction form
    15,356.28/21,193.71 = 11,388.72/x
  3. Step 3: Cross multiply
    15,356.28x = 21,193.71 × 11,388.72
  4. Step 4: Simplify right side
    15,356.28x = 241,369,228.95
  5. Step 5: Solve for x
    x = 241,369,228.95/15,356.28
  6. Step 6: Final answer
    x = 15,717.95

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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.