Home / 5,166.50-7,129.92-2,928.74

Finding the Fourth Proportional to 5,166.50, 7,129.92 and 2,928.74

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Solution

The fourth proportional to 5,166.50, 7,129.92 and 2,928.74 is: 4,041.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,166.50 : 7,129.92 = 2,928.74 : x
  2. Step 2: Convert to fraction form
    5,166.50/7,129.92 = 2,928.74/x
  3. Step 3: Cross multiply
    5,166.50x = 7,129.92 × 2,928.74
  4. Step 4: Simplify right side
    5,166.50x = 20,881,681.90
  5. Step 5: Solve for x
    x = 20,881,681.90/5,166.50
  6. Step 6: Final answer
    x = 4,041.75

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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.