Home / 20,178,256.80-30,267,385.20-12,997,898.40

Finding the Fourth Proportional to 20,178,256.80, 30,267,385.20 and 12,997,898.40

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Solution

The fourth proportional to 20,178,256.80, 30,267,385.20 and 12,997,898.40 is: 19,496,847.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,178,256.80 : 30,267,385.20 = 12,997,898.40 : x
  2. Step 2: Convert to fraction form
    20,178,256.80/30,267,385.20 = 12,997,898.40/x
  3. Step 3: Cross multiply
    20,178,256.80x = 30,267,385.20 × 12,997,898.40
  4. Step 4: Simplify right side
    20,178,256.80x = 393,412,397,663,263.69
  5. Step 5: Solve for x
    x = 393,412,397,663,263.69/20,178,256.80
  6. Step 6: Final answer
    x = 19,496,847.60

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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.