Home / 39,118.91-53,983.63-21,213.71

Finding the Fourth Proportional to 39,118.91, 53,983.63 and 21,213.71

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Solution

The fourth proportional to 39,118.91, 53,983.63 and 21,213.71 is: 29,274.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,118.91 : 53,983.63 = 21,213.71 : x
  2. Step 2: Convert to fraction form
    39,118.91/53,983.63 = 21,213.71/x
  3. Step 3: Cross multiply
    39,118.91x = 53,983.63 × 21,213.71
  4. Step 4: Simplify right side
    39,118.91x = 1,145,193,017.02
  5. Step 5: Solve for x
    x = 1,145,193,017.02/39,118.91
  6. Step 6: Final answer
    x = 29,274.66

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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.