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Finding the Fourth Proportional to 12,474,136.70, 18,711,205.05 and 9,114,904.70

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Solution

The fourth proportional to 12,474,136.70, 18,711,205.05 and 9,114,904.70 is: 13,672,357.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,474,136.70 : 18,711,205.05 = 9,114,904.70 : x
  2. Step 2: Convert to fraction form
    12,474,136.70/18,711,205.05 = 9,114,904.70/x
  3. Step 3: Cross multiply
    12,474,136.70x = 18,711,205.05 × 9,114,904.70
  4. Step 4: Simplify right side
    12,474,136.70x = 170,550,850,852,908.72
  5. Step 5: Solve for x
    x = 170,550,850,852,908.72/12,474,136.70
  6. Step 6: Final answer
    x = 13,672,357.05

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Similar ratio
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1.5x scale

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.