Home / 20,806,471.20-31,209,706.80-10,189,639.20

Finding the Fourth Proportional to 20,806,471.20, 31,209,706.80 and 10,189,639.20

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Solution

The fourth proportional to 20,806,471.20, 31,209,706.80 and 10,189,639.20 is: 15,284,458.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806,471.20 : 31,209,706.80 = 10,189,639.20 : x
  2. Step 2: Convert to fraction form
    20,806,471.20/31,209,706.80 = 10,189,639.20/x
  3. Step 3: Cross multiply
    20,806,471.20x = 31,209,706.80 × 10,189,639.20
  4. Step 4: Simplify right side
    20,806,471.20x = 318,015,651,829,786.56
  5. Step 5: Solve for x
    x = 318,015,651,829,786.56/20,806,471.20
  6. Step 6: Final answer
    x = 15,284,458.80

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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.