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Finding the Fourth Proportional to 9,339.78, 12,888.90 and 5,148.03

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Solution

The fourth proportional to 9,339.78, 12,888.90 and 5,148.03 is: 7,104.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,339.78 : 12,888.90 = 5,148.03 : x
  2. Step 2: Convert to fraction form
    9,339.78/12,888.90 = 5,148.03/x
  3. Step 3: Cross multiply
    9,339.78x = 12,888.90 × 5,148.03
  4. Step 4: Simplify right side
    9,339.78x = 66,352,443.87
  5. Step 5: Solve for x
    x = 66,352,443.87/9,339.78
  6. Step 6: Final answer
    x = 7,104.28

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1.5x scale

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.