Home / 21,002,816.80-31,504,225.20-20,870,106.40

Finding the Fourth Proportional to 21,002,816.80, 31,504,225.20 and 20,870,106.40

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Solution

The fourth proportional to 21,002,816.80, 31,504,225.20 and 20,870,106.40 is: 31,305,159.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002,816.80 : 31,504,225.20 = 20,870,106.40 : x
  2. Step 2: Convert to fraction form
    21,002,816.80/31,504,225.20 = 20,870,106.40/x
  3. Step 3: Cross multiply
    21,002,816.80x = 31,504,225.20 × 20,870,106.40
  4. Step 4: Simplify right side
    21,002,816.80x = 657,496,531,973,561.25
  5. Step 5: Solve for x
    x = 657,496,531,973,561.25/21,002,816.80
  6. Step 6: Final answer
    x = 31,305,159.60

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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.