Home / 28,185.84-38,897.64-15,609.72

Finding the Fourth Proportional to 28,185.84, 38,897.64 and 15,609.72

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Solution

The fourth proportional to 28,185.84, 38,897.64 and 15,609.72 is: 21,542.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,185.84 : 38,897.64 = 15,609.72 : x
  2. Step 2: Convert to fraction form
    28,185.84/38,897.64 = 15,609.72/x
  3. Step 3: Cross multiply
    28,185.84x = 38,897.64 × 15,609.72
  4. Step 4: Simplify right side
    28,185.84x = 607,181,269.06
  5. Step 5: Solve for x
    x = 607,181,269.06/28,185.84
  6. Step 6: Final answer
    x = 21,542.07

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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.