Home / 15,621.48-21,558.24-8,908.20

Finding the Fourth Proportional to 15,621.48, 21,558.24 and 8,908.20

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Solution

The fourth proportional to 15,621.48, 21,558.24 and 8,908.20 is: 12,293.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.48 : 21,558.24 = 8,908.20 : x
  2. Step 2: Convert to fraction form
    15,621.48/21,558.24 = 8,908.20/x
  3. Step 3: Cross multiply
    15,621.48x = 21,558.24 × 8,908.20
  4. Step 4: Simplify right side
    15,621.48x = 192,045,113.57
  5. Step 5: Solve for x
    x = 192,045,113.57/15,621.48
  6. Step 6: Final answer
    x = 12,293.66

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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.