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Finding the Fourth Proportional to 18,991,454.40, 28,499,428.80 and 10,477,900.80

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Solution

The fourth proportional to 18,991,454.40, 28,499,428.80 and 10,477,900.80 is: 15,723,608.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991,454.40 : 28,499,428.80 = 10,477,900.80 : x
  2. Step 2: Convert to fraction form
    18,991,454.40/28,499,428.80 = 10,477,900.80/x
  3. Step 3: Cross multiply
    18,991,454.40x = 28,499,428.80 × 10,477,900.80
  4. Step 4: Simplify right side
    18,991,454.40x = 298,614,187,823,063.06
  5. Step 5: Solve for x
    x = 298,614,187,823,063.06/18,991,454.40
  6. Step 6: Final answer
    x = 15,723,608.18

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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.