Home / 12,811.60-19,217.40-6,590.80

Finding the Fourth Proportional to 12,811.60, 19,217.40 and 6,590.80

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Solution

The fourth proportional to 12,811.60, 19,217.40 and 6,590.80 is: 9,886.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.60 : 19,217.40 = 6,590.80 : x
  2. Step 2: Convert to fraction form
    12,811.60/19,217.40 = 6,590.80/x
  3. Step 3: Cross multiply
    12,811.60x = 19,217.40 × 6,590.80
  4. Step 4: Simplify right side
    12,811.60x = 126,658,039.92
  5. Step 5: Solve for x
    x = 126,658,039.92/12,811.60
  6. Step 6: Final answer
    x = 9,886.20

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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.