Home / 15,325.72-21,150.47-8,520.51

Finding the Fourth Proportional to 15,325.72, 21,150.47 and 8,520.51

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Solution

The fourth proportional to 15,325.72, 21,150.47 and 8,520.51 is: 11,758.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,325.72 : 21,150.47 = 8,520.51 : x
  2. Step 2: Convert to fraction form
    15,325.72/21,150.47 = 8,520.51/x
  3. Step 3: Cross multiply
    15,325.72x = 21,150.47 × 8,520.51
  4. Step 4: Simplify right side
    15,325.72x = 180,212,791.14
  5. Step 5: Solve for x
    x = 180,212,791.14/15,325.72
  6. Step 6: Final answer
    x = 11,758.85

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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.