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Finding the Fourth Proportional to 9,339.90, 12,889.05 and 5,148.15

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Solution

The fourth proportional to 9,339.90, 12,889.05 and 5,148.15 is: 7,104.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,339.90 : 12,889.05 = 5,148.15 : x
  2. Step 2: Convert to fraction form
    9,339.90/12,889.05 = 5,148.15/x
  3. Step 3: Cross multiply
    9,339.90x = 12,889.05 × 5,148.15
  4. Step 4: Simplify right side
    9,339.90x = 66,354,762.76
  5. Step 5: Solve for x
    x = 66,354,762.76/9,339.90
  6. Step 6: Final answer
    x = 7,104.44

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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.