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Finding the Fourth Proportional to 39,884.40, 55,036.80 and 22,885.20

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Solution

The fourth proportional to 39,884.40, 55,036.80 and 22,885.20 is: 31,579.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884.40 : 55,036.80 = 22,885.20 : x
  2. Step 2: Convert to fraction form
    39,884.40/55,036.80 = 22,885.20/x
  3. Step 3: Cross multiply
    39,884.40x = 55,036.80 × 22,885.20
  4. Step 4: Simplify right side
    39,884.40x = 1,259,528,175.36
  5. Step 5: Solve for x
    x = 1,259,528,175.36/39,884.40
  6. Step 6: Final answer
    x = 31,579.47

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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.