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Finding the Fourth Proportional to 10,652,161.90, 15,978,242.85 and 7,392,657.10

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Solution

The fourth proportional to 10,652,161.90, 15,978,242.85 and 7,392,657.10 is: 11,088,985.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,652,161.90 : 15,978,242.85 = 7,392,657.10 : x
  2. Step 2: Convert to fraction form
    10,652,161.90/15,978,242.85 = 7,392,657.10/x
  3. Step 3: Cross multiply
    10,652,161.90x = 15,978,242.85 × 7,392,657.10
  4. Step 4: Simplify right side
    10,652,161.90x = 118,121,670,450,576.72
  5. Step 5: Solve for x
    x = 118,121,670,450,576.72/10,652,161.90
  6. Step 6: Final answer
    x = 11,088,985.65

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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.