Home / 21,005,325.20-31,507,987.80-8,221,581.20

Finding the Fourth Proportional to 21,005,325.20, 31,507,987.80 and 8,221,581.20

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Solution

The fourth proportional to 21,005,325.20, 31,507,987.80 and 8,221,581.20 is: 12,332,371.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,325.20 : 31,507,987.80 = 8,221,581.20 : x
  2. Step 2: Convert to fraction form
    21,005,325.20/31,507,987.80 = 8,221,581.20/x
  3. Step 3: Cross multiply
    21,005,325.20x = 31,507,987.80 × 8,221,581.20
  4. Step 4: Simplify right side
    21,005,325.20x = 259,045,480,146,309.38
  5. Step 5: Solve for x
    x = 259,045,480,146,309.38/21,005,325.20
  6. Step 6: Final answer
    x = 12,332,371.80

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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.