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Finding the Fourth Proportional to 10,661,643.20, 15,992,464.80 and 8,748,455.60

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Solution

The fourth proportional to 10,661,643.20, 15,992,464.80 and 8,748,455.60 is: 13,122,683.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,661,643.20 : 15,992,464.80 = 8,748,455.60 : x
  2. Step 2: Convert to fraction form
    10,661,643.20/15,992,464.80 = 8,748,455.60/x
  3. Step 3: Cross multiply
    10,661,643.20x = 15,992,464.80 × 8,748,455.60
  4. Step 4: Simplify right side
    10,661,643.20x = 139,909,368,237,362.88
  5. Step 5: Solve for x
    x = 139,909,368,237,362.88/10,661,643.20
  6. Step 6: Final answer
    x = 13,122,683.40

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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.