Home / 20,736,070.40-31,104,105.60-12,212,019.20

Finding the Fourth Proportional to 20,736,070.40, 31,104,105.60 and 12,212,019.20

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Solution

The fourth proportional to 20,736,070.40, 31,104,105.60 and 12,212,019.20 is: 18,318,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736,070.40 : 31,104,105.60 = 12,212,019.20 : x
  2. Step 2: Convert to fraction form
    20,736,070.40/31,104,105.60 = 12,212,019.20/x
  3. Step 3: Cross multiply
    20,736,070.40x = 31,104,105.60 × 12,212,019.20
  4. Step 4: Simplify right side
    20,736,070.40x = 379,843,934,786,027.50
  5. Step 5: Solve for x
    x = 379,843,934,786,027.50/20,736,070.40
  6. Step 6: Final answer
    x = 18,318,028.80

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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.