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Finding the Fourth Proportional to 9,118.60, 13,703.60 and 5,421.52

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Solution

The fourth proportional to 9,118.60, 13,703.60 and 5,421.52 is: 8,147.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,118.60 : 13,703.60 = 5,421.52 : x
  2. Step 2: Convert to fraction form
    9,118.60/13,703.60 = 5,421.52/x
  3. Step 3: Cross multiply
    9,118.60x = 13,703.60 × 5,421.52
  4. Step 4: Simplify right side
    9,118.60x = 74,294,341.47
  5. Step 5: Solve for x
    x = 74,294,341.47/9,118.60
  6. Step 6: Final answer
    x = 8,147.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.