Home / 27,721.21-38,255.64-15,784.60

Finding the Fourth Proportional to 27,721.21, 38,255.64 and 15,784.60

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Solution

The fourth proportional to 27,721.21, 38,255.64 and 15,784.60 is: 21,782.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,721.21 : 38,255.64 = 15,784.60 : x
  2. Step 2: Convert to fraction form
    27,721.21/38,255.64 = 15,784.60/x
  3. Step 3: Cross multiply
    27,721.21x = 38,255.64 × 15,784.60
  4. Step 4: Simplify right side
    27,721.21x = 603,849,873.24
  5. Step 5: Solve for x
    x = 603,849,873.24/27,721.21
  6. Step 6: Final answer
    x = 21,782.95

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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.