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Finding the Fourth Proportional to 9,135.99, 12,608.46 and 5,158.08

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Solution

The fourth proportional to 9,135.99, 12,608.46 and 5,158.08 is: 7,118.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,135.99 : 12,608.46 = 5,158.08 : x
  2. Step 2: Convert to fraction form
    9,135.99/12,608.46 = 5,158.08/x
  3. Step 3: Cross multiply
    9,135.99x = 12,608.46 × 5,158.08
  4. Step 4: Simplify right side
    9,135.99x = 65,035,445.36
  5. Step 5: Solve for x
    x = 65,035,445.36/9,135.99
  6. Step 6: Final answer
    x = 7,118.60

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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.