Home / 8,665.30-12,999.18-4,223.20

Finding the Fourth Proportional to 8,665.30, 12,999.18 and 4,223.20

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Solution

The fourth proportional to 8,665.30, 12,999.18 and 4,223.20 is: 6,335.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.30 : 12,999.18 = 4,223.20 : x
  2. Step 2: Convert to fraction form
    8,665.30/12,999.18 = 4,223.20/x
  3. Step 3: Cross multiply
    8,665.30x = 12,999.18 × 4,223.20
  4. Step 4: Simplify right side
    8,665.30x = 54,898,136.98
  5. Step 5: Solve for x
    x = 54,898,136.98/8,665.30
  6. Step 6: Final answer
    x = 6,335.40

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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.