Home / 39,315.89-54,256.91-21,411.87

Finding the Fourth Proportional to 39,315.89, 54,256.91 and 21,411.87

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Solution

The fourth proportional to 39,315.89, 54,256.91 and 21,411.87 is: 29,548.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,315.89 : 54,256.91 = 21,411.87 : x
  2. Step 2: Convert to fraction form
    39,315.89/54,256.91 = 21,411.87/x
  3. Step 3: Cross multiply
    39,315.89x = 54,256.91 × 21,411.87
  4. Step 4: Simplify right side
    39,315.89x = 1,161,741,796.46
  5. Step 5: Solve for x
    x = 1,161,741,796.46/39,315.89
  6. Step 6: Final answer
    x = 29,548.91

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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.