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Finding the Fourth Proportional to 9,339.70, 12,888.61 and 5,090.80

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Solution

The fourth proportional to 9,339.70, 12,888.61 and 5,090.80 is: 7,025.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,339.70 : 12,888.61 = 5,090.80 : x
  2. Step 2: Convert to fraction form
    9,339.70/12,888.61 = 5,090.80/x
  3. Step 3: Cross multiply
    9,339.70x = 12,888.61 × 5,090.80
  4. Step 4: Simplify right side
    9,339.70x = 65,613,335.79
  5. Step 5: Solve for x
    x = 65,613,335.79/9,339.70
  6. Step 6: Final answer
    x = 7,025.21

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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.