Home / 8,785.80-12,128.67-6,893.10

Finding the Fourth Proportional to 8,785.80, 12,128.67 and 6,893.10

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Solution

The fourth proportional to 8,785.80, 12,128.67 and 6,893.10 is: 9,515.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,785.80 : 12,128.67 = 6,893.10 : x
  2. Step 2: Convert to fraction form
    8,785.80/12,128.67 = 6,893.10/x
  3. Step 3: Cross multiply
    8,785.80x = 12,128.67 × 6,893.10
  4. Step 4: Simplify right side
    8,785.80x = 83,604,135.18
  5. Step 5: Solve for x
    x = 83,604,135.18/8,785.80
  6. Step 6: Final answer
    x = 9,515.82

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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.