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Finding the Fourth Proportional to 7,913,602.80, 10,920,841.20 and 4,291,930.80

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Solution

The fourth proportional to 7,913,602.80, 10,920,841.20 and 4,291,930.80 is: 5,922,902.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,913,602.80 : 10,920,841.20 = 4,291,930.80 : x
  2. Step 2: Convert to fraction form
    7,913,602.80/10,920,841.20 = 4,291,930.80/x
  3. Step 3: Cross multiply
    7,913,602.80x = 10,920,841.20 × 4,291,930.80
  4. Step 4: Simplify right side
    7,913,602.80x = 46,871,494,708,188.95
  5. Step 5: Solve for x
    x = 46,871,494,708,188.95/7,913,602.80
  6. Step 6: Final answer
    x = 5,922,902.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.