Home / 15,520.12-21,417.47-8,621.04

Finding the Fourth Proportional to 15,520.12, 21,417.47 and 8,621.04

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Solution

The fourth proportional to 15,520.12, 21,417.47 and 8,621.04 is: 11,896.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.12 : 21,417.47 = 8,621.04 : x
  2. Step 2: Convert to fraction form
    15,520.12/21,417.47 = 8,621.04/x
  3. Step 3: Cross multiply
    15,520.12x = 21,417.47 × 8,621.04
  4. Step 4: Simplify right side
    15,520.12x = 184,640,758.48
  5. Step 5: Solve for x
    x = 184,640,758.48/15,520.12
  6. Step 6: Final answer
    x = 11,896.87

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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.