Home / 39,381.88-54,348.02-21,477.64

Finding the Fourth Proportional to 39,381.88, 54,348.02 and 21,477.64

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Solution

The fourth proportional to 39,381.88, 54,348.02 and 21,477.64 is: 29,639.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,381.88 : 54,348.02 = 21,477.64 : x
  2. Step 2: Convert to fraction form
    39,381.88/54,348.02 = 21,477.64/x
  3. Step 3: Cross multiply
    39,381.88x = 54,348.02 × 21,477.64
  4. Step 4: Simplify right side
    39,381.88x = 1,167,267,208.27
  5. Step 5: Solve for x
    x = 1,167,267,208.27/39,381.88
  6. Step 6: Final answer
    x = 29,639.70

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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.