Home / 15,435.26-21,300.26-8,721.58

Finding the Fourth Proportional to 15,435.26, 21,300.26 and 8,721.58

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Solution

The fourth proportional to 15,435.26, 21,300.26 and 8,721.58 is: 12,035.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,435.26 : 21,300.26 = 8,721.58 : x
  2. Step 2: Convert to fraction form
    15,435.26/21,300.26 = 8,721.58/x
  3. Step 3: Cross multiply
    15,435.26x = 21,300.26 × 8,721.58
  4. Step 4: Simplify right side
    15,435.26x = 185,771,921.61
  5. Step 5: Solve for x
    x = 185,771,921.61/15,435.26
  6. Step 6: Final answer
    x = 12,035.56

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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.