Home / 7,143.80-10,778.54-6,898.36

Finding the Fourth Proportional to 7,143.80, 10,778.54 and 6,898.36

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Solution

The fourth proportional to 7,143.80, 10,778.54 and 6,898.36 is: 10,408.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.80 : 10,778.54 = 6,898.36 : x
  2. Step 2: Convert to fraction form
    7,143.80/10,778.54 = 6,898.36/x
  3. Step 3: Cross multiply
    7,143.80x = 10,778.54 × 6,898.36
  4. Step 4: Simplify right side
    7,143.80x = 74,354,214.70
  5. Step 5: Solve for x
    x = 74,354,214.70/7,143.80
  6. Step 6: Final answer
    x = 10,408.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.