Home / 15,638.23-21,575.39-8,919.02

Finding the Fourth Proportional to 15,638.23, 21,575.39 and 8,919.02

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Solution

The fourth proportional to 15,638.23, 21,575.39 and 8,919.02 is: 12,305.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,638.23 : 21,575.39 = 8,919.02 : x
  2. Step 2: Convert to fraction form
    15,638.23/21,575.39 = 8,919.02/x
  3. Step 3: Cross multiply
    15,638.23x = 21,575.39 × 8,919.02
  4. Step 4: Simplify right side
    15,638.23x = 192,431,411.15
  5. Step 5: Solve for x
    x = 192,431,411.15/15,638.23
  6. Step 6: Final answer
    x = 12,305.19

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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.