Home / 28,257.12-38,993.28-15,681.12

Finding the Fourth Proportional to 28,257.12, 38,993.28 and 15,681.12

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Solution

The fourth proportional to 28,257.12, 38,993.28 and 15,681.12 is: 21,639.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,257.12 : 38,993.28 = 15,681.12 : x
  2. Step 2: Convert to fraction form
    28,257.12/38,993.28 = 15,681.12/x
  3. Step 3: Cross multiply
    28,257.12x = 38,993.28 × 15,681.12
  4. Step 4: Simplify right side
    28,257.12x = 611,458,302.87
  5. Step 5: Solve for x
    x = 611,458,302.87/28,257.12
  6. Step 6: Final answer
    x = 21,639.09

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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.