Home / 21,139,931.40-31,695,900.30-7,675,009.80

Finding the Fourth Proportional to 21,139,931.40, 31,695,900.30 and 7,675,009.80

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Solution

The fourth proportional to 21,139,931.40, 31,695,900.30 and 7,675,009.80 is: 11,507,433.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139,931.40 : 31,695,900.30 = 7,675,009.80 : x
  2. Step 2: Convert to fraction form
    21,139,931.40/31,695,900.30 = 7,675,009.80/x
  3. Step 3: Cross multiply
    21,139,931.40x = 31,695,900.30 × 7,675,009.80
  4. Step 4: Simplify right side
    21,139,931.40x = 243,266,345,422,322.94
  5. Step 5: Solve for x
    x = 243,266,345,422,322.94/21,139,931.40
  6. Step 6: Final answer
    x = 11,507,433.06

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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.