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Finding the Fourth Proportional to 39,087, 53,941.98 and 21,423

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Solution

The fourth proportional to 39,087, 53,941.98 and 21,423 is: 29,564.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,087 : 53,941.98 = 21,423 : x
  2. Step 2: Convert to fraction form
    39,087/53,941.98 = 21,423/x
  3. Step 3: Cross multiply
    39,087x = 53,941.98 × 21,423
  4. Step 4: Simplify right side
    39,087x = 1,155,599,037.54
  5. Step 5: Solve for x
    x = 1,155,599,037.54/39,087
  6. Step 6: Final answer
    x = 29,564.79

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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.