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Finding the Fourth Proportional to 9,117.68, 12,580.08 and 5,579.60

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Solution

The fourth proportional to 9,117.68, 12,580.08 and 5,579.60 is: 7,698.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,117.68 : 12,580.08 = 5,579.60 : x
  2. Step 2: Convert to fraction form
    9,117.68/12,580.08 = 5,579.60/x
  3. Step 3: Cross multiply
    9,117.68x = 12,580.08 × 5,579.60
  4. Step 4: Simplify right side
    9,117.68x = 70,191,814.37
  5. Step 5: Solve for x
    x = 70,191,814.37/9,117.68
  6. Step 6: Final answer
    x = 7,698.43

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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.