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Finding the Fourth Proportional to 8,522,309.80, 12,783,464.70 and 2,842,719.40

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Solution

The fourth proportional to 8,522,309.80, 12,783,464.70 and 2,842,719.40 is: 4,264,079.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,522,309.80 : 12,783,464.70 = 2,842,719.40 : x
  2. Step 2: Convert to fraction form
    8,522,309.80/12,783,464.70 = 2,842,719.40/x
  3. Step 3: Cross multiply
    8,522,309.80x = 12,783,464.70 × 2,842,719.40
  4. Step 4: Simplify right side
    8,522,309.80x = 36,339,803,101,905.18
  5. Step 5: Solve for x
    x = 36,339,803,101,905.18/8,522,309.80
  6. Step 6: Final answer
    x = 4,264,079.10

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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.