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Finding the Fourth Proportional to 39,969.16, 55,157.12 and 22,064.16

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Solution

The fourth proportional to 39,969.16, 55,157.12 and 22,064.16 is: 30,448.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,969.16 : 55,157.12 = 22,064.16 : x
  2. Step 2: Convert to fraction form
    39,969.16/55,157.12 = 22,064.16/x
  3. Step 3: Cross multiply
    39,969.16x = 55,157.12 × 22,064.16
  4. Step 4: Simplify right side
    39,969.16x = 1,216,995,520.82
  5. Step 5: Solve for x
    x = 1,216,995,520.82/39,969.16
  6. Step 6: Final answer
    x = 30,448.36

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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.