Home / 21,121,336.85-29,142,449.12-11,953,979.60

Finding the Fourth Proportional to 21,121,336.85, 29,142,449.12 and 11,953,979.60

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Solution

The fourth proportional to 21,121,336.85, 29,142,449.12 and 11,953,979.60 is: 16,493,664.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121,336.85 : 29,142,449.12 = 11,953,979.60 : x
  2. Step 2: Convert to fraction form
    21,121,336.85/29,142,449.12 = 11,953,979.60/x
  3. Step 3: Cross multiply
    21,121,336.85x = 29,142,449.12 × 11,953,979.60
  4. Step 4: Simplify right side
    21,121,336.85x = 348,368,242,158,690.69
  5. Step 5: Solve for x
    x = 348,368,242,158,690.69/21,121,336.85
  6. Step 6: Final answer
    x = 16,493,664.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.