Home / 8,878.40-13,317.46-5,135.80

Finding the Fourth Proportional to 8,878.40, 13,317.46 and 5,135.80

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Solution

The fourth proportional to 8,878.40, 13,317.46 and 5,135.80 is: 7,703.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,878.40 : 13,317.46 = 5,135.80 : x
  2. Step 2: Convert to fraction form
    8,878.40/13,317.46 = 5,135.80/x
  3. Step 3: Cross multiply
    8,878.40x = 13,317.46 × 5,135.80
  4. Step 4: Simplify right side
    8,878.40x = 68,395,811.07
  5. Step 5: Solve for x
    x = 68,395,811.07/8,878.40
  6. Step 6: Final answer
    x = 7,703.62

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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.