Home / 20,511,522.71-28,314,616.97-12,780,384.76

Finding the Fourth Proportional to 20,511,522.71, 28,314,616.97 and 12,780,384.76

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Solution

The fourth proportional to 20,511,522.71, 28,314,616.97 and 12,780,384.76 is: 17,642,361.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511,522.71 : 28,314,616.97 = 12,780,384.76 : x
  2. Step 2: Convert to fraction form
    20,511,522.71/28,314,616.97 = 12,780,384.76/x
  3. Step 3: Cross multiply
    20,511,522.71x = 28,314,616.97 × 12,780,384.76
  4. Step 4: Simplify right side
    20,511,522.71x = 361,871,699,208,625.38
  5. Step 5: Solve for x
    x = 361,871,699,208,625.38/20,511,522.71
  6. Step 6: Final answer
    x = 17,642,361.53

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Double scale
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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.