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Finding the Fourth Proportional to 7,160.54, 9,879.51 and 4,642.75

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Solution

The fourth proportional to 7,160.54, 9,879.51 and 4,642.75 is: 6,405.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,160.54 : 9,879.51 = 4,642.75 : x
  2. Step 2: Convert to fraction form
    7,160.54/9,879.51 = 4,642.75/x
  3. Step 3: Cross multiply
    7,160.54x = 9,879.51 × 4,642.75
  4. Step 4: Simplify right side
    7,160.54x = 45,868,124.81
  5. Step 5: Solve for x
    x = 45,868,124.81/7,160.54
  6. Step 6: Final answer
    x = 6,405.68

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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.