Home / 20,810.10-31,215.30-8,331.19

Finding the Fourth Proportional to 20,810.10, 31,215.30 and 8,331.19

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Solution

The fourth proportional to 20,810.10, 31,215.30 and 8,331.19 is: 12,496.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.10 : 31,215.30 = 8,331.19 : x
  2. Step 2: Convert to fraction form
    20,810.10/31,215.30 = 8,331.19/x
  3. Step 3: Cross multiply
    20,810.10x = 31,215.30 × 8,331.19
  4. Step 4: Simplify right side
    20,810.10x = 260,060,595.21
  5. Step 5: Solve for x
    x = 260,060,595.21/20,810.10
  6. Step 6: Final answer
    x = 12,496.85

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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.