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Finding the Fourth Proportional to 18,947,672.70, 28,421,509.05 and 18,416,231.70

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Solution

The fourth proportional to 18,947,672.70, 28,421,509.05 and 18,416,231.70 is: 27,624,347.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,947,672.70 : 28,421,509.05 = 18,416,231.70 : x
  2. Step 2: Convert to fraction form
    18,947,672.70/28,421,509.05 = 18,416,231.70/x
  3. Step 3: Cross multiply
    18,947,672.70x = 28,421,509.05 × 18,416,231.70
  4. Step 4: Simplify right side
    18,947,672.70x = 523,417,095,928,446.88
  5. Step 5: Solve for x
    x = 523,417,095,928,446.88/18,947,672.70
  6. Step 6: Final answer
    x = 27,624,347.55

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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.