Home / 21,873.18-30,148.62-15,491.58

Finding the Fourth Proportional to 21,873.18, 30,148.62 and 15,491.58

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Solution

The fourth proportional to 21,873.18, 30,148.62 and 15,491.58 is: 21,352.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,873.18 : 30,148.62 = 15,491.58 : x
  2. Step 2: Convert to fraction form
    21,873.18/30,148.62 = 15,491.58/x
  3. Step 3: Cross multiply
    21,873.18x = 30,148.62 × 15,491.58
  4. Step 4: Simplify right side
    21,873.18x = 467,049,758.62
  5. Step 5: Solve for x
    x = 467,049,758.62/21,873.18
  6. Step 6: Final answer
    x = 21,352.62

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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.