Home / 39,869.30-55,022.12-21,964.30

Finding the Fourth Proportional to 39,869.30, 55,022.12 and 21,964.30

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Solution

The fourth proportional to 39,869.30, 55,022.12 and 21,964.30 is: 30,312.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,869.30 : 55,022.12 = 21,964.30 : x
  2. Step 2: Convert to fraction form
    39,869.30/55,022.12 = 21,964.30/x
  3. Step 3: Cross multiply
    39,869.30x = 55,022.12 × 21,964.30
  4. Step 4: Simplify right side
    39,869.30x = 1,208,522,350.32
  5. Step 5: Solve for x
    x = 1,208,522,350.32/39,869.30
  6. Step 6: Final answer
    x = 30,312.10

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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.