Home / 20,178,352.80-30,267,529.20-12,997,994.40

Finding the Fourth Proportional to 20,178,352.80, 30,267,529.20 and 12,997,994.40

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Solution

The fourth proportional to 20,178,352.80, 30,267,529.20 and 12,997,994.40 is: 19,496,991.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,178,352.80 : 30,267,529.20 = 12,997,994.40 : x
  2. Step 2: Convert to fraction form
    20,178,352.80/30,267,529.20 = 12,997,994.40/x
  3. Step 3: Cross multiply
    20,178,352.80x = 30,267,529.20 × 12,997,994.40
  4. Step 4: Simplify right side
    20,178,352.80x = 393,417,175,043,436.50
  5. Step 5: Solve for x
    x = 393,417,175,043,436.50/20,178,352.80
  6. Step 6: Final answer
    x = 19,496,991.60

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Similar ratio
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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.