Home / 19,386.61-29,079.30-8,147.91

Finding the Fourth Proportional to 19,386.61, 29,079.30 and 8,147.91

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Solution

The fourth proportional to 19,386.61, 29,079.30 and 8,147.91 is: 12,221.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,386.61 : 29,079.30 = 8,147.91 : x
  2. Step 2: Convert to fraction form
    19,386.61/29,079.30 = 8,147.91/x
  3. Step 3: Cross multiply
    19,386.61x = 29,079.30 × 8,147.91
  4. Step 4: Simplify right side
    19,386.61x = 236,935,519.26
  5. Step 5: Solve for x
    x = 236,935,519.26/19,386.61
  6. Step 6: Final answer
    x = 12,221.61

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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.