Home / 20,776.50-31,164.75-8,302.10

Finding the Fourth Proportional to 20,776.50, 31,164.75 and 8,302.10

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Solution

The fourth proportional to 20,776.50, 31,164.75 and 8,302.10 is: 12,453.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.50 : 31,164.75 = 8,302.10 : x
  2. Step 2: Convert to fraction form
    20,776.50/31,164.75 = 8,302.10/x
  3. Step 3: Cross multiply
    20,776.50x = 31,164.75 × 8,302.10
  4. Step 4: Simplify right side
    20,776.50x = 258,732,715.15
  5. Step 5: Solve for x
    x = 258,732,715.15/20,776.50
  6. Step 6: Final answer
    x = 12,453.14

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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.