Home / 12,989.80-19,502.70-8,338.60

Finding the Fourth Proportional to 12,989.80, 19,502.70 and 8,338.60

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Solution

The fourth proportional to 12,989.80, 19,502.70 and 8,338.60 is: 12,519.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.80 : 19,502.70 = 8,338.60 : x
  2. Step 2: Convert to fraction form
    12,989.80/19,502.70 = 8,338.60/x
  3. Step 3: Cross multiply
    12,989.80x = 19,502.70 × 8,338.60
  4. Step 4: Simplify right side
    12,989.80x = 162,625,214.22
  5. Step 5: Solve for x
    x = 162,625,214.22/12,989.80
  6. Step 6: Final answer
    x = 12,519.45

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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.