Home / 20,511,512.15-28,314,602.39-12,780,374.20

Finding the Fourth Proportional to 20,511,512.15, 28,314,602.39 and 12,780,374.20

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Solution

The fourth proportional to 20,511,512.15, 28,314,602.39 and 12,780,374.20 is: 17,642,346.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511,512.15 : 28,314,602.39 = 12,780,374.20 : x
  2. Step 2: Convert to fraction form
    20,511,512.15/28,314,602.39 = 12,780,374.20/x
  3. Step 3: Cross multiply
    20,511,512.15x = 28,314,602.39 × 12,780,374.20
  4. Step 4: Simplify right side
    20,511,512.15x = 361,871,213,829,578.75
  5. Step 5: Solve for x
    x = 361,871,213,829,578.75/20,511,512.15
  6. Step 6: Final answer
    x = 17,642,346.95

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1.5x scale

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.