Home / 8,020.40-12,024.36-5,390.72

Finding the Fourth Proportional to 8,020.40, 12,024.36 and 5,390.72

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Solution

The fourth proportional to 8,020.40, 12,024.36 and 5,390.72 is: 8,081.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,020.40 : 12,024.36 = 5,390.72 : x
  2. Step 2: Convert to fraction form
    8,020.40/12,024.36 = 5,390.72/x
  3. Step 3: Cross multiply
    8,020.40x = 12,024.36 × 5,390.72
  4. Step 4: Simplify right side
    8,020.40x = 64,819,957.94
  5. Step 5: Solve for x
    x = 64,819,957.94/8,020.40
  6. Step 6: Final answer
    x = 8,081.89

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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.