Home / 20,671.29-28,491.69-15,824.35

Finding the Fourth Proportional to 20,671.29, 28,491.69 and 15,824.35

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Solution

The fourth proportional to 20,671.29, 28,491.69 and 15,824.35 is: 21,811.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,671.29 : 28,491.69 = 15,824.35 : x
  2. Step 2: Convert to fraction form
    20,671.29/28,491.69 = 15,824.35/x
  3. Step 3: Cross multiply
    20,671.29x = 28,491.69 × 15,824.35
  4. Step 4: Simplify right side
    20,671.29x = 450,862,474.65
  5. Step 5: Solve for x
    x = 450,862,474.65/20,671.29
  6. Step 6: Final answer
    x = 21,811.05

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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.