Home / 8,789.18-12,128.58-4,809.51

Finding the Fourth Proportional to 8,789.18, 12,128.58 and 4,809.51

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Solution

The fourth proportional to 8,789.18, 12,128.58 and 4,809.51 is: 6,636.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.18 : 12,128.58 = 4,809.51 : x
  2. Step 2: Convert to fraction form
    8,789.18/12,128.58 = 4,809.51/x
  3. Step 3: Cross multiply
    8,789.18x = 12,128.58 × 4,809.51
  4. Step 4: Simplify right side
    8,789.18x = 58,332,526.80
  5. Step 5: Solve for x
    x = 58,332,526.80/8,789.18
  6. Step 6: Final answer
    x = 6,636.86

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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.