Home / 21,356,490.72-29,448,341.76-13,609,261.92

Finding the Fourth Proportional to 21,356,490.72, 29,448,341.76 and 13,609,261.92

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Solution

The fourth proportional to 21,356,490.72, 29,448,341.76 and 13,609,261.92 is: 18,765,732.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,356,490.72 : 29,448,341.76 = 13,609,261.92 : x
  2. Step 2: Convert to fraction form
    21,356,490.72/29,448,341.76 = 13,609,261.92/x
  3. Step 3: Cross multiply
    21,356,490.72x = 29,448,341.76 × 13,609,261.92
  4. Step 4: Simplify right side
    21,356,490.72x = 400,770,196,121,513.81
  5. Step 5: Solve for x
    x = 400,770,196,121,513.81/21,356,490.72
  6. Step 6: Final answer
    x = 18,765,732.69

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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.