Home / 28,107.60-42,169.64-8,386.80

Finding the Fourth Proportional to 28,107.60, 42,169.64 and 8,386.80

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Solution

The fourth proportional to 28,107.60, 42,169.64 and 8,386.80 is: 12,582.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107.60 : 42,169.64 = 8,386.80 : x
  2. Step 2: Convert to fraction form
    28,107.60/42,169.64 = 8,386.80/x
  3. Step 3: Cross multiply
    28,107.60x = 42,169.64 × 8,386.80
  4. Step 4: Simplify right side
    28,107.60x = 353,668,336.75
  5. Step 5: Solve for x
    x = 353,668,336.75/28,107.60
  6. Step 6: Final answer
    x = 12,582.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.