Home / 21,087.07-31,630.58-8,612.96

Finding the Fourth Proportional to 21,087.07, 31,630.58 and 8,612.96

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Solution

The fourth proportional to 21,087.07, 31,630.58 and 8,612.96 is: 12,919.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.07 : 31,630.58 = 8,612.96 : x
  2. Step 2: Convert to fraction form
    21,087.07/31,630.58 = 8,612.96/x
  3. Step 3: Cross multiply
    21,087.07x = 31,630.58 × 8,612.96
  4. Step 4: Simplify right side
    21,087.07x = 272,432,751.40
  5. Step 5: Solve for x
    x = 272,432,751.40/21,087.07
  6. Step 6: Final answer
    x = 12,919.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.