Home / 20,511,520.40-28,314,613.79-12,780,382.46

Finding the Fourth Proportional to 20,511,520.40, 28,314,613.79 and 12,780,382.46

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Solution

The fourth proportional to 20,511,520.40, 28,314,613.79 and 12,780,382.46 is: 17,642,358.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511,520.40 : 28,314,613.79 = 12,780,382.46 : x
  2. Step 2: Convert to fraction form
    20,511,520.40/28,314,613.79 = 12,780,382.46/x
  3. Step 3: Cross multiply
    20,511,520.40x = 28,314,613.79 × 12,780,382.46
  4. Step 4: Simplify right side
    20,511,520.40x = 361,871,593,237,915.12
  5. Step 5: Solve for x
    x = 361,871,593,237,915.12/20,511,520.40
  6. Step 6: Final answer
    x = 17,642,358.36

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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.