Home / 28,172,712.80-42,259,069.20-21,787,547.60

Finding the Fourth Proportional to 28,172,712.80, 42,259,069.20 and 21,787,547.60

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Solution

The fourth proportional to 28,172,712.80, 42,259,069.20 and 21,787,547.60 is: 32,681,321.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172,712.80 : 42,259,069.20 = 21,787,547.60 : x
  2. Step 2: Convert to fraction form
    28,172,712.80/42,259,069.20 = 21,787,547.60/x
  3. Step 3: Cross multiply
    28,172,712.80x = 42,259,069.20 × 21,787,547.60
  4. Step 4: Simplify right side
    28,172,712.80x = 920,721,481,726,694
  5. Step 5: Solve for x
    x = 920,721,481,726,694/28,172,712.80
  6. Step 6: Final answer
    x = 32,681,321.40

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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.