Home / 21,015,280.80-31,522,921.20-12,032,445.60

Finding the Fourth Proportional to 21,015,280.80, 31,522,921.20 and 12,032,445.60

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Solution

The fourth proportional to 21,015,280.80, 31,522,921.20 and 12,032,445.60 is: 18,048,668.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015,280.80 : 31,522,921.20 = 12,032,445.60 : x
  2. Step 2: Convert to fraction form
    21,015,280.80/31,522,921.20 = 12,032,445.60/x
  3. Step 3: Cross multiply
    21,015,280.80x = 31,522,921.20 × 12,032,445.60
  4. Step 4: Simplify right side
    21,015,280.80x = 379,297,834,492,086.69
  5. Step 5: Solve for x
    x = 379,297,834,492,086.69/21,015,280.80
  6. Step 6: Final answer
    x = 18,048,668.40

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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.