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Finding the Fourth Proportional to 5,584, 7,720.48 and 5,339.20

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Solution

The fourth proportional to 5,584, 7,720.48 and 5,339.20 is: 7,382.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,584 : 7,720.48 = 5,339.20 : x
  2. Step 2: Convert to fraction form
    5,584/7,720.48 = 5,339.20/x
  3. Step 3: Cross multiply
    5,584x = 7,720.48 × 5,339.20
  4. Step 4: Simplify right side
    5,584x = 41,221,186.82
  5. Step 5: Solve for x
    x = 41,221,186.82/5,584
  6. Step 6: Final answer
    x = 7,382.02

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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.