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Finding the Fourth Proportional to 5,590.60, 7,720.53 and 5,065.72

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Solution

The fourth proportional to 5,590.60, 7,720.53 and 5,065.72 is: 6,995.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,590.60 : 7,720.53 = 5,065.72 : x
  2. Step 2: Convert to fraction form
    5,590.60/7,720.53 = 5,065.72/x
  3. Step 3: Cross multiply
    5,590.60x = 7,720.53 × 5,065.72
  4. Step 4: Simplify right side
    5,590.60x = 39,110,043.23
  5. Step 5: Solve for x
    x = 39,110,043.23/5,590.60
  6. Step 6: Final answer
    x = 6,995.68

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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.