Home / 12,115,208.80-18,172,813.20-8,713,986.40

Finding the Fourth Proportional to 12,115,208.80, 18,172,813.20 and 8,713,986.40

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Solution

The fourth proportional to 12,115,208.80, 18,172,813.20 and 8,713,986.40 is: 13,070,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115,208.80 : 18,172,813.20 = 8,713,986.40 : x
  2. Step 2: Convert to fraction form
    12,115,208.80/18,172,813.20 = 8,713,986.40/x
  3. Step 3: Cross multiply
    12,115,208.80x = 18,172,813.20 × 8,713,986.40
  4. Step 4: Simplify right side
    12,115,208.80x = 158,357,647,074,540.47
  5. Step 5: Solve for x
    x = 158,357,647,074,540.47/12,115,208.80
  6. Step 6: Final answer
    x = 13,070,979.60

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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.