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Finding the Fourth Proportional to 15,201,396.27, 20,978,266.28 and 8,674,895.79

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Solution

The fourth proportional to 15,201,396.27, 20,978,266.28 and 8,674,895.79 is: 11,971,549.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,201,396.27 : 20,978,266.28 = 8,674,895.79 : x
  2. Step 2: Convert to fraction form
    15,201,396.27/20,978,266.28 = 8,674,895.79/x
  3. Step 3: Cross multiply
    15,201,396.27x = 20,978,266.28 × 8,674,895.79
  4. Step 4: Simplify right side
    15,201,396.27x = 181,984,273,833,870.94
  5. Step 5: Solve for x
    x = 181,984,273,833,870.94/15,201,396.27
  6. Step 6: Final answer
    x = 11,971,549.89

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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.