Home / 12,139,915.20-18,209,872.80-12,069,056.40

Finding the Fourth Proportional to 12,139,915.20, 18,209,872.80 and 12,069,056.40

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Solution

The fourth proportional to 12,139,915.20, 18,209,872.80 and 12,069,056.40 is: 18,103,584.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139,915.20 : 18,209,872.80 = 12,069,056.40 : x
  2. Step 2: Convert to fraction form
    12,139,915.20/18,209,872.80 = 12,069,056.40/x
  3. Step 3: Cross multiply
    12,139,915.20x = 18,209,872.80 × 12,069,056.40
  4. Step 4: Simplify right side
    12,139,915.20x = 219,775,981,860,025.94
  5. Step 5: Solve for x
    x = 219,775,981,860,025.94/12,139,915.20
  6. Step 6: Final answer
    x = 18,103,584.60

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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.