Home / 27,720.96-38,253.24-15,784.80

Finding the Fourth Proportional to 27,720.96, 38,253.24 and 15,784.80

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Solution

The fourth proportional to 27,720.96, 38,253.24 and 15,784.80 is: 21,782.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,720.96 : 38,253.24 = 15,784.80 : x
  2. Step 2: Convert to fraction form
    27,720.96/38,253.24 = 15,784.80/x
  3. Step 3: Cross multiply
    27,720.96x = 38,253.24 × 15,784.80
  4. Step 4: Simplify right side
    27,720.96x = 603,819,742.75
  5. Step 5: Solve for x
    x = 603,819,742.75/27,720.96
  6. Step 6: Final answer
    x = 21,782.06

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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.