Home / 20,612,012.80-30,918,019.20-13,072,403.20

Finding the Fourth Proportional to 20,612,012.80, 30,918,019.20 and 13,072,403.20

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Solution

The fourth proportional to 20,612,012.80, 30,918,019.20 and 13,072,403.20 is: 19,608,604.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612,012.80 : 30,918,019.20 = 13,072,403.20 : x
  2. Step 2: Convert to fraction form
    20,612,012.80/30,918,019.20 = 13,072,403.20/x
  3. Step 3: Cross multiply
    20,612,012.80x = 30,918,019.20 × 13,072,403.20
  4. Step 4: Simplify right side
    20,612,012.80x = 404,172,813,127,741.44
  5. Step 5: Solve for x
    x = 404,172,813,127,741.44/20,612,012.80
  6. Step 6: Final answer
    x = 19,608,604.80

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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.