Home / 21,613.99-29,830.22-12,665.06

Finding the Fourth Proportional to 21,613.99, 29,830.22 and 12,665.06

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Solution

The fourth proportional to 21,613.99, 29,830.22 and 12,665.06 is: 17,479.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,613.99 : 29,830.22 = 12,665.06 : x
  2. Step 2: Convert to fraction form
    21,613.99/29,830.22 = 12,665.06/x
  3. Step 3: Cross multiply
    21,613.99x = 29,830.22 × 12,665.06
  4. Step 4: Simplify right side
    21,613.99x = 377,801,526.11
  5. Step 5: Solve for x
    x = 377,801,526.11/21,613.99
  6. Step 6: Final answer
    x = 17,479.49

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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.