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Finding the Fourth Proportional to 15,835.60, 21,882.05 and 15,067.01

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Solution

The fourth proportional to 15,835.60, 21,882.05 and 15,067.01 is: 20,819.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,835.60 : 21,882.05 = 15,067.01 : x
  2. Step 2: Convert to fraction form
    15,835.60/21,882.05 = 15,067.01/x
  3. Step 3: Cross multiply
    15,835.60x = 21,882.05 × 15,067.01
  4. Step 4: Simplify right side
    15,835.60x = 329,697,102.04
  5. Step 5: Solve for x
    x = 329,697,102.04/15,835.60
  6. Step 6: Final answer
    x = 20,819.99

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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.