Home / 28,208.68-38,928-15,633.43

Finding the Fourth Proportional to 28,208.68, 38,928 and 15,633.43

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Solution

The fourth proportional to 28,208.68, 38,928 and 15,633.43 is: 21,574.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,208.68 : 38,928 = 15,633.43 : x
  2. Step 2: Convert to fraction form
    28,208.68/38,928 = 15,633.43/x
  3. Step 3: Cross multiply
    28,208.68x = 38,928 × 15,633.43
  4. Step 4: Simplify right side
    28,208.68x = 608,578,163.04
  5. Step 5: Solve for x
    x = 608,578,163.04/28,208.68
  6. Step 6: Final answer
    x = 21,574.15

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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.