Home / 28,065.82-38,730.24-15,318.58

Finding the Fourth Proportional to 28,065.82, 38,730.24 and 15,318.58

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Solution

The fourth proportional to 28,065.82, 38,730.24 and 15,318.58 is: 21,139.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,065.82 : 38,730.24 = 15,318.58 : x
  2. Step 2: Convert to fraction form
    28,065.82/38,730.24 = 15,318.58/x
  3. Step 3: Cross multiply
    28,065.82x = 38,730.24 × 15,318.58
  4. Step 4: Simplify right side
    28,065.82x = 593,292,279.86
  5. Step 5: Solve for x
    x = 593,292,279.86/28,065.82
  6. Step 6: Final answer
    x = 21,139.32

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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.