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Finding the Fourth Proportional to 18,581,421.60, 27,872,132.40 and 12,124,413.45

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Solution

The fourth proportional to 18,581,421.60, 27,872,132.40 and 12,124,413.45 is: 18,186,620.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,581,421.60 : 27,872,132.40 = 12,124,413.45 : x
  2. Step 2: Convert to fraction form
    18,581,421.60/27,872,132.40 = 12,124,413.45/x
  3. Step 3: Cross multiply
    18,581,421.60x = 27,872,132.40 × 12,124,413.45
  4. Step 4: Simplify right side
    18,581,421.60x = 337,933,256,950,740.75
  5. Step 5: Solve for x
    x = 337,933,256,950,740.75/18,581,421.60
  6. Step 6: Final answer
    x = 18,186,620.18

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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.