Home / 27,720.71-38,254-15,621.84

Finding the Fourth Proportional to 27,720.71, 38,254 and 15,621.84

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Solution

The fourth proportional to 27,720.71, 38,254 and 15,621.84 is: 21,557.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,720.71 : 38,254 = 15,621.84 : x
  2. Step 2: Convert to fraction form
    27,720.71/38,254 = 15,621.84/x
  3. Step 3: Cross multiply
    27,720.71x = 38,254 × 15,621.84
  4. Step 4: Simplify right side
    27,720.71x = 597,597,867.36
  5. Step 5: Solve for x
    x = 597,597,867.36/27,720.71
  6. Step 6: Final answer
    x = 21,557.81

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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.