Home / 8,220.02-12,315.68-6,842.21

Finding the Fourth Proportional to 8,220.02, 12,315.68 and 6,842.21

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Solution

The fourth proportional to 8,220.02, 12,315.68 and 6,842.21 is: 10,251.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,220.02 : 12,315.68 = 6,842.21 : x
  2. Step 2: Convert to fraction form
    8,220.02/12,315.68 = 6,842.21/x
  3. Step 3: Cross multiply
    8,220.02x = 12,315.68 × 6,842.21
  4. Step 4: Simplify right side
    8,220.02x = 84,266,434.64
  5. Step 5: Solve for x
    x = 84,266,434.64/8,220.02
  6. Step 6: Final answer
    x = 10,251.37

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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.