Home / 15,686.72-21,648.48-8,613.44

Finding the Fourth Proportional to 15,686.72, 21,648.48 and 8,613.44

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Solution

The fourth proportional to 15,686.72, 21,648.48 and 8,613.44 is: 11,886.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.72 : 21,648.48 = 8,613.44 : x
  2. Step 2: Convert to fraction form
    15,686.72/21,648.48 = 8,613.44/x
  3. Step 3: Cross multiply
    15,686.72x = 21,648.48 × 8,613.44
  4. Step 4: Simplify right side
    15,686.72x = 186,467,883.57
  5. Step 5: Solve for x
    x = 186,467,883.57/15,686.72
  6. Step 6: Final answer
    x = 11,886.99

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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.