Home / 39,287.68-54,215.34-21,382.72

Finding the Fourth Proportional to 39,287.68, 54,215.34 and 21,382.72

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Solution

The fourth proportional to 39,287.68, 54,215.34 and 21,382.72 is: 29,507.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,287.68 : 54,215.34 = 21,382.72 : x
  2. Step 2: Convert to fraction form
    39,287.68/54,215.34 = 21,382.72/x
  3. Step 3: Cross multiply
    39,287.68x = 54,215.34 × 21,382.72
  4. Step 4: Simplify right side
    39,287.68x = 1,159,271,434.92
  5. Step 5: Solve for x
    x = 1,159,271,434.92/39,287.68
  6. Step 6: Final answer
    x = 29,507.25

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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.