Home / 21,005,352.80-31,508,029.20-19,729,894.40

Finding the Fourth Proportional to 21,005,352.80, 31,508,029.20 and 19,729,894.40

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Solution

The fourth proportional to 21,005,352.80, 31,508,029.20 and 19,729,894.40 is: 29,594,841.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,352.80 : 31,508,029.20 = 19,729,894.40 : x
  2. Step 2: Convert to fraction form
    21,005,352.80/31,508,029.20 = 19,729,894.40/x
  3. Step 3: Cross multiply
    21,005,352.80x = 31,508,029.20 × 19,729,894.40
  4. Step 4: Simplify right side
    21,005,352.80x = 621,650,088,868,116.38
  5. Step 5: Solve for x
    x = 621,650,088,868,116.38/21,005,352.80
  6. Step 6: Final answer
    x = 29,594,841.60

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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.