Home / 20,490,971.32-28,281,039.06-12,231,459.64

Finding the Fourth Proportional to 20,490,971.32, 28,281,039.06 and 12,231,459.64

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Solution

The fourth proportional to 20,490,971.32, 28,281,039.06 and 12,231,459.64 is: 16,881,502.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490,971.32 : 28,281,039.06 = 12,231,459.64 : x
  2. Step 2: Convert to fraction form
    20,490,971.32/28,281,039.06 = 12,231,459.64/x
  3. Step 3: Cross multiply
    20,490,971.32x = 28,281,039.06 × 12,231,459.64
  4. Step 4: Simplify right side
    20,490,971.32x = 345,918,387,839,653.56
  5. Step 5: Solve for x
    x = 345,918,387,839,653.56/20,490,971.32
  6. Step 6: Final answer
    x = 16,881,502.71

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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.