Home / 28,405.14-39,200.81-15,658.31

Finding the Fourth Proportional to 28,405.14, 39,200.81 and 15,658.31

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Solution

The fourth proportional to 28,405.14, 39,200.81 and 15,658.31 is: 21,609.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.14 : 39,200.81 = 15,658.31 : x
  2. Step 2: Convert to fraction form
    28,405.14/39,200.81 = 15,658.31/x
  3. Step 3: Cross multiply
    28,405.14x = 39,200.81 × 15,658.31
  4. Step 4: Simplify right side
    28,405.14x = 613,818,160.94
  5. Step 5: Solve for x
    x = 613,818,160.94/28,405.14
  6. Step 6: Final answer
    x = 21,609.40

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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.