Home / 15,435.29-21,299.44-8,721.50

Finding the Fourth Proportional to 15,435.29, 21,299.44 and 8,721.50

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Solution

The fourth proportional to 15,435.29, 21,299.44 and 8,721.50 is: 12,034.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,435.29 : 21,299.44 = 8,721.50 : x
  2. Step 2: Convert to fraction form
    15,435.29/21,299.44 = 8,721.50/x
  3. Step 3: Cross multiply
    15,435.29x = 21,299.44 × 8,721.50
  4. Step 4: Simplify right side
    15,435.29x = 185,763,022.35
  5. Step 5: Solve for x
    x = 185,763,022.35/15,435.29
  6. Step 6: Final answer
    x = 12,034.96

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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.