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Finding the Fourth Proportional to 39,038.71, 53,873.43 and 21,133.71

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Solution

The fourth proportional to 39,038.71, 53,873.43 and 21,133.71 is: 29,164.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,038.71 : 53,873.43 = 21,133.71 : x
  2. Step 2: Convert to fraction form
    39,038.71/53,873.43 = 21,133.71/x
  3. Step 3: Cross multiply
    39,038.71x = 53,873.43 × 21,133.71
  4. Step 4: Simplify right side
    39,038.71x = 1,138,545,540.08
  5. Step 5: Solve for x
    x = 1,138,545,540.08/39,038.71
  6. Step 6: Final answer
    x = 29,164.53

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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.