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Finding the Fourth Proportional to 39,959.45, 59,919.74 and 21,248.45

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Solution

The fourth proportional to 39,959.45, 59,919.74 and 21,248.45 is: 31,862.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,959.45 : 59,919.74 = 21,248.45 : x
  2. Step 2: Convert to fraction form
    39,959.45/59,919.74 = 21,248.45/x
  3. Step 3: Cross multiply
    39,959.45x = 59,919.74 × 21,248.45
  4. Step 4: Simplify right side
    39,959.45x = 1,273,201,722.64
  5. Step 5: Solve for x
    x = 1,273,201,722.64/39,959.45
  6. Step 6: Final answer
    x = 31,862.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.