Home / 21,020,564.80-31,530,847.20-19,745,106.40

Finding the Fourth Proportional to 21,020,564.80, 31,530,847.20 and 19,745,106.40

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Solution

The fourth proportional to 21,020,564.80, 31,530,847.20 and 19,745,106.40 is: 29,617,659.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020,564.80 : 31,530,847.20 = 19,745,106.40 : x
  2. Step 2: Convert to fraction form
    21,020,564.80/31,530,847.20 = 19,745,106.40/x
  3. Step 3: Cross multiply
    21,020,564.80x = 31,530,847.20 × 19,745,106.40
  4. Step 4: Simplify right side
    21,020,564.80x = 622,579,932,846,142
  5. Step 5: Solve for x
    x = 622,579,932,846,142/21,020,564.80
  6. Step 6: Final answer
    x = 29,617,659.60

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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.