Home / 8,790.50-12,128.03-6,139.37

Finding the Fourth Proportional to 8,790.50, 12,128.03 and 6,139.37

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Solution

The fourth proportional to 8,790.50, 12,128.03 and 6,139.37 is: 8,470.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,790.50 : 12,128.03 = 6,139.37 : x
  2. Step 2: Convert to fraction form
    8,790.50/12,128.03 = 6,139.37/x
  3. Step 3: Cross multiply
    8,790.50x = 12,128.03 × 6,139.37
  4. Step 4: Simplify right side
    8,790.50x = 74,458,463.54
  5. Step 5: Solve for x
    x = 74,458,463.54/8,790.50
  6. Step 6: Final answer
    x = 8,470.33

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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.