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Finding the Fourth Proportional to 9,018, 12,445.07 and 5,039.78

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Solution

The fourth proportional to 9,018, 12,445.07 and 5,039.78 is: 6,955.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,018 : 12,445.07 = 5,039.78 : x
  2. Step 2: Convert to fraction form
    9,018/12,445.07 = 5,039.78/x
  3. Step 3: Cross multiply
    9,018x = 12,445.07 × 5,039.78
  4. Step 4: Simplify right side
    9,018x = 62,720,327.46
  5. Step 5: Solve for x
    x = 62,720,327.46/9,018
  6. Step 6: Final answer
    x = 6,955.02

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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.