Home / 15,686.91-21,647.93-8,613.79

Finding the Fourth Proportional to 15,686.91, 21,647.93 and 8,613.79

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Solution

The fourth proportional to 15,686.91, 21,647.93 and 8,613.79 is: 11,887.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.91 : 21,647.93 = 8,613.79 : x
  2. Step 2: Convert to fraction form
    15,686.91/21,647.93 = 8,613.79/x
  3. Step 3: Cross multiply
    15,686.91x = 21,647.93 × 8,613.79
  4. Step 4: Simplify right side
    15,686.91x = 186,470,690.37
  5. Step 5: Solve for x
    x = 186,470,690.37/15,686.91
  6. Step 6: Final answer
    x = 11,887.02

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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.