Home / 7,428.80-11,151.30-4,140.20

Finding the Fourth Proportional to 7,428.80, 11,151.30 and 4,140.20

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Solution

The fourth proportional to 7,428.80, 11,151.30 and 4,140.20 is: 6,214.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,428.80 : 11,151.30 = 4,140.20 : x
  2. Step 2: Convert to fraction form
    7,428.80/11,151.30 = 4,140.20/x
  3. Step 3: Cross multiply
    7,428.80x = 11,151.30 × 4,140.20
  4. Step 4: Simplify right side
    7,428.80x = 46,168,612.26
  5. Step 5: Solve for x
    x = 46,168,612.26/7,428.80
  6. Step 6: Final answer
    x = 6,214.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.