Home / 8,939.40-12,335.46-5,163.77

Finding the Fourth Proportional to 8,939.40, 12,335.46 and 5,163.77

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Solution

The fourth proportional to 8,939.40, 12,335.46 and 5,163.77 is: 7,125.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.40 : 12,335.46 = 5,163.77 : x
  2. Step 2: Convert to fraction form
    8,939.40/12,335.46 = 5,163.77/x
  3. Step 3: Cross multiply
    8,939.40x = 12,335.46 × 5,163.77
  4. Step 4: Simplify right side
    8,939.40x = 63,697,420.37
  5. Step 5: Solve for x
    x = 63,697,420.37/8,939.40
  6. Step 6: Final answer
    x = 7,125.47

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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.