Home / 15,686.48-21,647.38-8,613.35

Finding the Fourth Proportional to 15,686.48, 21,647.38 and 8,613.35

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Solution

The fourth proportional to 15,686.48, 21,647.38 and 8,613.35 is: 11,886.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.48 : 21,647.38 = 8,613.35 : x
  2. Step 2: Convert to fraction form
    15,686.48/21,647.38 = 8,613.35/x
  3. Step 3: Cross multiply
    15,686.48x = 21,647.38 × 8,613.35
  4. Step 4: Simplify right side
    15,686.48x = 186,456,460.52
  5. Step 5: Solve for x
    x = 186,456,460.52/15,686.48
  6. Step 6: Final answer
    x = 11,886.44

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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.