Home / 39,339.78-54,288.21-21,434.91

Finding the Fourth Proportional to 39,339.78, 54,288.21 and 21,434.91

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Solution

The fourth proportional to 39,339.78, 54,288.21 and 21,434.91 is: 29,579.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,339.78 : 54,288.21 = 21,434.91 : x
  2. Step 2: Convert to fraction form
    39,339.78/54,288.21 = 21,434.91/x
  3. Step 3: Cross multiply
    39,339.78x = 54,288.21 × 21,434.91
  4. Step 4: Simplify right side
    39,339.78x = 1,163,662,895.41
  5. Step 5: Solve for x
    x = 1,163,662,895.41/39,339.78
  6. Step 6: Final answer
    x = 29,579.80

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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.