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Finding the Fourth Proportional to 8,474,135.60, 12,711,203.40 and 5,072,913.20

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Solution

The fourth proportional to 8,474,135.60, 12,711,203.40 and 5,072,913.20 is: 7,609,369.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,474,135.60 : 12,711,203.40 = 5,072,913.20 : x
  2. Step 2: Convert to fraction form
    8,474,135.60/12,711,203.40 = 5,072,913.20/x
  3. Step 3: Cross multiply
    8,474,135.60x = 12,711,203.40 × 5,072,913.20
  4. Step 4: Simplify right side
    8,474,135.60x = 64,482,831,515,744.88
  5. Step 5: Solve for x
    x = 64,482,831,515,744.88/8,474,135.60
  6. Step 6: Final answer
    x = 7,609,369.80

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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.