Home / 28,129,920.84-42,140,284.92-20,730,530.16

Finding the Fourth Proportional to 28,129,920.84, 42,140,284.92 and 20,730,530.16

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Solution

The fourth proportional to 28,129,920.84, 42,140,284.92 and 20,730,530.16 is: 31,055,560.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129,920.84 : 42,140,284.92 = 20,730,530.16 : x
  2. Step 2: Convert to fraction form
    28,129,920.84/42,140,284.92 = 20,730,530.16/x
  3. Step 3: Cross multiply
    28,129,920.84x = 42,140,284.92 × 20,730,530.16
  4. Step 4: Simplify right side
    28,129,920.84x = 873,590,447,485,053.25
  5. Step 5: Solve for x
    x = 873,590,447,485,053.25/28,129,920.84
  6. Step 6: Final answer
    x = 31,055,560.11

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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.