Home / 18,720,965.80-28,081,448.70-15,851,184.40

Finding the Fourth Proportional to 18,720,965.80, 28,081,448.70 and 15,851,184.40

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Solution

The fourth proportional to 18,720,965.80, 28,081,448.70 and 15,851,184.40 is: 23,776,776.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720,965.80 : 28,081,448.70 = 15,851,184.40 : x
  2. Step 2: Convert to fraction form
    18,720,965.80/28,081,448.70 = 15,851,184.40/x
  3. Step 3: Cross multiply
    18,720,965.80x = 28,081,448.70 × 15,851,184.40
  4. Step 4: Simplify right side
    18,720,965.80x = 445,124,221,562,840.25
  5. Step 5: Solve for x
    x = 445,124,221,562,840.25/18,720,965.80
  6. Step 6: Final answer
    x = 23,776,776.60

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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.