Home / 21,160.39-29,186.18-13,981.99

Finding the Fourth Proportional to 21,160.39, 29,186.18 and 13,981.99

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Solution

The fourth proportional to 21,160.39, 29,186.18 and 13,981.99 is: 19,285.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.39 : 29,186.18 = 13,981.99 : x
  2. Step 2: Convert to fraction form
    21,160.39/29,186.18 = 13,981.99/x
  3. Step 3: Cross multiply
    21,160.39x = 29,186.18 × 13,981.99
  4. Step 4: Simplify right side
    21,160.39x = 408,080,806.99
  5. Step 5: Solve for x
    x = 408,080,806.99/21,160.39
  6. Step 6: Final answer
    x = 19,285.13

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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.