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Finding the Fourth Proportional to 39,984.51, 55,412.04 and 39,420.75

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Solution

The fourth proportional to 39,984.51, 55,412.04 and 39,420.75 is: 54,630.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,984.51 : 55,412.04 = 39,420.75 : x
  2. Step 2: Convert to fraction form
    39,984.51/55,412.04 = 39,420.75/x
  3. Step 3: Cross multiply
    39,984.51x = 55,412.04 × 39,420.75
  4. Step 4: Simplify right side
    39,984.51x = 2,184,384,175.83
  5. Step 5: Solve for x
    x = 2,184,384,175.83/39,984.51
  6. Step 6: Final answer
    x = 54,630.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.