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Finding the Fourth Proportional to 18,663,609.60, 27,995,414.40 and 5,200,437.60

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Solution

The fourth proportional to 18,663,609.60, 27,995,414.40 and 5,200,437.60 is: 7,800,656.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663,609.60 : 27,995,414.40 = 5,200,437.60 : x
  2. Step 2: Convert to fraction form
    18,663,609.60/27,995,414.40 = 5,200,437.60/x
  3. Step 3: Cross multiply
    18,663,609.60x = 27,995,414.40 × 5,200,437.60
  4. Step 4: Simplify right side
    18,663,609.60x = 145,588,405,673,341.41
  5. Step 5: Solve for x
    x = 145,588,405,673,341.41/18,663,609.60
  6. Step 6: Final answer
    x = 7,800,656.40

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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.