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Finding the Fourth Proportional to 10,658,530.80, 15,989,351.40 and 4,978,940.40

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Solution

The fourth proportional to 10,658,530.80, 15,989,351.40 and 4,978,940.40 is: 7,469,137.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,658,530.80 : 15,989,351.40 = 4,978,940.40 : x
  2. Step 2: Convert to fraction form
    10,658,530.80/15,989,351.40 = 4,978,940.40/x
  3. Step 3: Cross multiply
    10,658,530.80x = 15,989,351.40 × 4,978,940.40
  4. Step 4: Simplify right side
    10,658,530.80x = 79,610,027,655,256.56
  5. Step 5: Solve for x
    x = 79,610,027,655,256.56/10,658,530.80
  6. Step 6: Final answer
    x = 7,469,137.08

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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.