Home / 20,924.84-28,875.20-11,491.58

Finding the Fourth Proportional to 20,924.84, 28,875.20 and 11,491.58

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Solution

The fourth proportional to 20,924.84, 28,875.20 and 11,491.58 is: 15,857.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,924.84 : 28,875.20 = 11,491.58 : x
  2. Step 2: Convert to fraction form
    20,924.84/28,875.20 = 11,491.58/x
  3. Step 3: Cross multiply
    20,924.84x = 28,875.20 × 11,491.58
  4. Step 4: Simplify right side
    20,924.84x = 331,821,670.82
  5. Step 5: Solve for x
    x = 331,821,670.82/20,924.84
  6. Step 6: Final answer
    x = 15,857.79

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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.