Home / 21,969,939.80-32,954,909.70-12,989,869.40

Finding the Fourth Proportional to 21,969,939.80, 32,954,909.70 and 12,989,869.40

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Solution

The fourth proportional to 21,969,939.80, 32,954,909.70 and 12,989,869.40 is: 19,484,804.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969,939.80 : 32,954,909.70 = 12,989,869.40 : x
  2. Step 2: Convert to fraction form
    21,969,939.80/32,954,909.70 = 12,989,869.40/x
  3. Step 3: Cross multiply
    21,969,939.80x = 32,954,909.70 × 12,989,869.40
  4. Step 4: Simplify right side
    21,969,939.80x = 428,079,973,091,793.19
  5. Step 5: Solve for x
    x = 428,079,973,091,793.19/21,969,939.80
  6. Step 6: Final answer
    x = 19,484,804.10

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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.