Home / 27,985.45-38,620.86-15,239.12

Finding the Fourth Proportional to 27,985.45, 38,620.86 and 15,239.12

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Solution

The fourth proportional to 27,985.45, 38,620.86 and 15,239.12 is: 21,030.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,985.45 : 38,620.86 = 15,239.12 : x
  2. Step 2: Convert to fraction form
    27,985.45/38,620.86 = 15,239.12/x
  3. Step 3: Cross multiply
    27,985.45x = 38,620.86 × 15,239.12
  4. Step 4: Simplify right side
    27,985.45x = 588,548,016.60
  5. Step 5: Solve for x
    x = 588,548,016.60/27,985.45
  6. Step 6: Final answer
    x = 21,030.50

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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.