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Finding the Fourth Proportional to 38,887.50, 53,664.75 and 21,223.50

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Solution

The fourth proportional to 38,887.50, 53,664.75 and 21,223.50 is: 29,288.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,887.50 : 53,664.75 = 21,223.50 : x
  2. Step 2: Convert to fraction form
    38,887.50/53,664.75 = 21,223.50/x
  3. Step 3: Cross multiply
    38,887.50x = 53,664.75 × 21,223.50
  4. Step 4: Simplify right side
    38,887.50x = 1,138,953,821.63
  5. Step 5: Solve for x
    x = 1,138,953,821.63/38,887.50
  6. Step 6: Final answer
    x = 29,288.43

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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.