Home / 15,639.76-21,592.20-13,890.16

Finding the Fourth Proportional to 15,639.76, 21,592.20 and 13,890.16

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Solution

The fourth proportional to 15,639.76, 21,592.20 and 13,890.16 is: 19,176.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,639.76 : 21,592.20 = 13,890.16 : x
  2. Step 2: Convert to fraction form
    15,639.76/21,592.20 = 13,890.16/x
  3. Step 3: Cross multiply
    15,639.76x = 21,592.20 × 13,890.16
  4. Step 4: Simplify right side
    15,639.76x = 299,919,112.75
  5. Step 5: Solve for x
    x = 299,919,112.75/15,639.76
  6. Step 6: Final answer
    x = 19,176.71

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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.