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Finding the Fourth Proportional to 39,763.83, 54,875.49 and 21,860.49

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Solution

The fourth proportional to 39,763.83, 54,875.49 and 21,860.49 is: 30,168.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,763.83 : 54,875.49 = 21,860.49 : x
  2. Step 2: Convert to fraction form
    39,763.83/54,875.49 = 21,860.49/x
  3. Step 3: Cross multiply
    39,763.83x = 54,875.49 × 21,860.49
  4. Step 4: Simplify right side
    39,763.83x = 1,199,605,100.39
  5. Step 5: Solve for x
    x = 1,199,605,100.39/39,763.83
  6. Step 6: Final answer
    x = 30,168.25

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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.