Home / 20,771,861.47-28,665,257.78-11,352,842.72

Finding the Fourth Proportional to 20,771,861.47, 28,665,257.78 and 11,352,842.72

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Solution

The fourth proportional to 20,771,861.47, 28,665,257.78 and 11,352,842.72 is: 15,666,971.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771,861.47 : 28,665,257.78 = 11,352,842.72 : x
  2. Step 2: Convert to fraction form
    20,771,861.47/28,665,257.78 = 11,352,842.72/x
  3. Step 3: Cross multiply
    20,771,861.47x = 28,665,257.78 × 11,352,842.72
  4. Step 4: Simplify right side
    20,771,861.47x = 325,432,163,054,573.75
  5. Step 5: Solve for x
    x = 325,432,163,054,573.75/20,771,861.47
  6. Step 6: Final answer
    x = 15,666,971.57

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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.