Home / 19,113.91-28,658.19-9,120.20

Finding the Fourth Proportional to 19,113.91, 28,658.19 and 9,120.20

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Solution

The fourth proportional to 19,113.91, 28,658.19 and 9,120.20 is: 13,674.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,113.91 : 28,658.19 = 9,120.20 : x
  2. Step 2: Convert to fraction form
    19,113.91/28,658.19 = 9,120.20/x
  3. Step 3: Cross multiply
    19,113.91x = 28,658.19 × 9,120.20
  4. Step 4: Simplify right side
    19,113.91x = 261,368,281.15
  5. Step 5: Solve for x
    x = 261,368,281.15/19,113.91
  6. Step 6: Final answer
    x = 13,674.25

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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.