Home / 19,145.57-28,718.40-7,458.80

Finding the Fourth Proportional to 19,145.57, 28,718.40 and 7,458.80

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Solution

The fourth proportional to 19,145.57, 28,718.40 and 7,458.80 is: 11,188.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,145.57 : 28,718.40 = 7,458.80 : x
  2. Step 2: Convert to fraction form
    19,145.57/28,718.40 = 7,458.80/x
  3. Step 3: Cross multiply
    19,145.57x = 28,718.40 × 7,458.80
  4. Step 4: Simplify right side
    19,145.57x = 214,204,801.92
  5. Step 5: Solve for x
    x = 214,204,801.92/19,145.57
  6. Step 6: Final answer
    x = 11,188.22

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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.