Home / 39,025.68-53,855.12-21,120.32

Finding the Fourth Proportional to 39,025.68, 53,855.12 and 21,120.32

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Solution

The fourth proportional to 39,025.68, 53,855.12 and 21,120.32 is: 29,145.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,025.68 : 53,855.12 = 21,120.32 : x
  2. Step 2: Convert to fraction form
    39,025.68/53,855.12 = 21,120.32/x
  3. Step 3: Cross multiply
    39,025.68x = 53,855.12 × 21,120.32
  4. Step 4: Simplify right side
    39,025.68x = 1,137,437,368.04
  5. Step 5: Solve for x
    x = 1,137,437,368.04/39,025.68
  6. Step 6: Final answer
    x = 29,145.87

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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.