Home / 20,679,631.20-28,519,313.22-12,945,378.60

Finding the Fourth Proportional to 20,679,631.20, 28,519,313.22 and 12,945,378.60

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Solution

The fourth proportional to 20,679,631.20, 28,519,313.22 and 12,945,378.60 is: 17,852,992.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679,631.20 : 28,519,313.22 = 12,945,378.60 : x
  2. Step 2: Convert to fraction form
    20,679,631.20/28,519,313.22 = 12,945,378.60/x
  3. Step 3: Cross multiply
    20,679,631.20x = 28,519,313.22 × 12,945,378.60
  4. Step 4: Simplify right side
    20,679,631.20x = 369,193,307,044,885.06
  5. Step 5: Solve for x
    x = 369,193,307,044,885.06/20,679,631.20
  6. Step 6: Final answer
    x = 17,852,992.81

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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.