Home / 27,981.09-38,614.05-15,405.84

Finding the Fourth Proportional to 27,981.09, 38,614.05 and 15,405.84

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Solution

The fourth proportional to 27,981.09, 38,614.05 and 15,405.84 is: 21,260.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,981.09 : 38,614.05 = 15,405.84 : x
  2. Step 2: Convert to fraction form
    27,981.09/38,614.05 = 15,405.84/x
  3. Step 3: Cross multiply
    27,981.09x = 38,614.05 × 15,405.84
  4. Step 4: Simplify right side
    27,981.09x = 594,881,876.05
  5. Step 5: Solve for x
    x = 594,881,876.05/27,981.09
  6. Step 6: Final answer
    x = 21,260.14

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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.