Home / 21,086.80-31,630.41-8,603.49

Finding the Fourth Proportional to 21,086.80, 31,630.41 and 8,603.49

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Solution

The fourth proportional to 21,086.80, 31,630.41 and 8,603.49 is: 12,905.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.80 : 31,630.41 = 8,603.49 : x
  2. Step 2: Convert to fraction form
    21,086.80/31,630.41 = 8,603.49/x
  3. Step 3: Cross multiply
    21,086.80x = 31,630.41 × 8,603.49
  4. Step 4: Simplify right side
    21,086.80x = 272,131,916.13
  5. Step 5: Solve for x
    x = 272,131,916.13/21,086.80
  6. Step 6: Final answer
    x = 12,905.32

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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.