Home / 21,005,112.80-31,554,908.40-20,202,046.40

Finding the Fourth Proportional to 21,005,112.80, 31,554,908.40 and 20,202,046.40

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Solution

The fourth proportional to 21,005,112.80, 31,554,908.40 and 20,202,046.40 is: 30,348,502.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,112.80 : 31,554,908.40 = 20,202,046.40 : x
  2. Step 2: Convert to fraction form
    21,005,112.80/31,554,908.40 = 20,202,046.40/x
  3. Step 3: Cross multiply
    21,005,112.80x = 31,554,908.40 × 20,202,046.40
  4. Step 4: Simplify right side
    21,005,112.80x = 637,473,723,644,549.62
  5. Step 5: Solve for x
    x = 637,473,723,644,549.62/21,005,112.80
  6. Step 6: Final answer
    x = 30,348,502.75

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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.