Home / 21,005,355.80-31,508,033.70-19,729,897.40

Finding the Fourth Proportional to 21,005,355.80, 31,508,033.70 and 19,729,897.40

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Solution

The fourth proportional to 21,005,355.80, 31,508,033.70 and 19,729,897.40 is: 29,594,846.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,355.80 : 31,508,033.70 = 19,729,897.40 : x
  2. Step 2: Convert to fraction form
    21,005,355.80/31,508,033.70 = 19,729,897.40/x
  3. Step 3: Cross multiply
    21,005,355.80x = 31,508,033.70 × 19,729,897.40
  4. Step 4: Simplify right side
    21,005,355.80x = 621,650,272,176,742.38
  5. Step 5: Solve for x
    x = 621,650,272,176,742.38/21,005,355.80
  6. Step 6: Final answer
    x = 29,594,846.10

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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.