Home / 21,515.72-29,683.37-15,863.90

Finding the Fourth Proportional to 21,515.72, 29,683.37 and 15,863.90

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Solution

The fourth proportional to 21,515.72, 29,683.37 and 15,863.90 is: 21,886.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.72 : 29,683.37 = 15,863.90 : x
  2. Step 2: Convert to fraction form
    21,515.72/29,683.37 = 15,863.90/x
  3. Step 3: Cross multiply
    21,515.72x = 29,683.37 × 15,863.90
  4. Step 4: Simplify right side
    21,515.72x = 470,893,785.61
  5. Step 5: Solve for x
    x = 470,893,785.61/21,515.72
  6. Step 6: Final answer
    x = 21,886.04

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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.