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Finding the Fourth Proportional to 13,772,041.20, 20,640,347.10 and 8,374,962.60

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Solution

The fourth proportional to 13,772,041.20, 20,640,347.10 and 8,374,962.60 is: 12,551,671.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,772,041.20 : 20,640,347.10 = 8,374,962.60 : x
  2. Step 2: Convert to fraction form
    13,772,041.20/20,640,347.10 = 8,374,962.60/x
  3. Step 3: Cross multiply
    13,772,041.20x = 20,640,347.10 × 8,374,962.60
  4. Step 4: Simplify right side
    13,772,041.20x = 172,862,135,013,518.47
  5. Step 5: Solve for x
    x = 172,862,135,013,518.47/13,772,041.20
  6. Step 6: Final answer
    x = 12,551,671.35

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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.