Home / 15,621.24-21,551.22-9,642.54

Finding the Fourth Proportional to 15,621.24, 21,551.22 and 9,642.54

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Solution

The fourth proportional to 15,621.24, 21,551.22 and 9,642.54 is: 13,302.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.24 : 21,551.22 = 9,642.54 : x
  2. Step 2: Convert to fraction form
    15,621.24/21,551.22 = 9,642.54/x
  3. Step 3: Cross multiply
    15,621.24x = 21,551.22 × 9,642.54
  4. Step 4: Simplify right side
    15,621.24x = 207,808,500.90
  5. Step 5: Solve for x
    x = 207,808,500.90/15,621.24
  6. Step 6: Final answer
    x = 13,302.95

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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.