Home / 28,220.74-42,331.68-8,231.69

Finding the Fourth Proportional to 28,220.74, 42,331.68 and 8,231.69

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Solution

The fourth proportional to 28,220.74, 42,331.68 and 8,231.69 is: 12,347.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,220.74 : 42,331.68 = 8,231.69 : x
  2. Step 2: Convert to fraction form
    28,220.74/42,331.68 = 8,231.69/x
  3. Step 3: Cross multiply
    28,220.74x = 42,331.68 × 8,231.69
  4. Step 4: Simplify right side
    28,220.74x = 348,461,372.77
  5. Step 5: Solve for x
    x = 348,461,372.77/28,220.74
  6. Step 6: Final answer
    x = 12,347.71

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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.