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Finding the Fourth Proportional to 15,201,389.52, 20,978,256.96 and 8,674,889.04

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Solution

The fourth proportional to 15,201,389.52, 20,978,256.96 and 8,674,889.04 is: 11,971,540.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,201,389.52 : 20,978,256.96 = 8,674,889.04 : x
  2. Step 2: Convert to fraction form
    15,201,389.52/20,978,256.96 = 8,674,889.04/x
  3. Step 3: Cross multiply
    15,201,389.52x = 20,978,256.96 × 8,674,889.04
  4. Step 4: Simplify right side
    15,201,389.52x = 181,984,051,380,607.72
  5. Step 5: Solve for x
    x = 181,984,051,380,607.72/15,201,389.52
  6. Step 6: Final answer
    x = 11,971,540.57

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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.