Home / 39,434.16-54,418.32-21,529.20

Finding the Fourth Proportional to 39,434.16, 54,418.32 and 21,529.20

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Solution

The fourth proportional to 39,434.16, 54,418.32 and 21,529.20 is: 29,709.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,434.16 : 54,418.32 = 21,529.20 : x
  2. Step 2: Convert to fraction form
    39,434.16/54,418.32 = 21,529.20/x
  3. Step 3: Cross multiply
    39,434.16x = 54,418.32 × 21,529.20
  4. Step 4: Simplify right side
    39,434.16x = 1,171,582,894.94
  5. Step 5: Solve for x
    x = 1,171,582,894.94/39,434.16
  6. Step 6: Final answer
    x = 29,709.85

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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.