Home / 10,860.80-16,291.20-7,118.60

Finding the Fourth Proportional to 10,860.80, 16,291.20 and 7,118.60

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Solution

The fourth proportional to 10,860.80, 16,291.20 and 7,118.60 is: 10,677.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,860.80 : 16,291.20 = 7,118.60 : x
  2. Step 2: Convert to fraction form
    10,860.80/16,291.20 = 7,118.60/x
  3. Step 3: Cross multiply
    10,860.80x = 16,291.20 × 7,118.60
  4. Step 4: Simplify right side
    10,860.80x = 115,970,536.32
  5. Step 5: Solve for x
    x = 115,970,536.32/10,860.80
  6. Step 6: Final answer
    x = 10,677.90

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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.