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Finding the Fourth Proportional to 7,215.86, 9,958.19 and 4,029.35

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Solution

The fourth proportional to 7,215.86, 9,958.19 and 4,029.35 is: 5,560.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215.86 : 9,958.19 = 4,029.35 : x
  2. Step 2: Convert to fraction form
    7,215.86/9,958.19 = 4,029.35/x
  3. Step 3: Cross multiply
    7,215.86x = 9,958.19 × 4,029.35
  4. Step 4: Simplify right side
    7,215.86x = 40,124,962.94
  5. Step 5: Solve for x
    x = 40,124,962.94/7,215.86
  6. Step 6: Final answer
    x = 5,560.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.