Home / 28,421.20-39,220.04-15,845.84

Finding the Fourth Proportional to 28,421.20, 39,220.04 and 15,845.84

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Solution

The fourth proportional to 28,421.20, 39,220.04 and 15,845.84 is: 21,866.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.20 : 39,220.04 = 15,845.84 : x
  2. Step 2: Convert to fraction form
    28,421.20/39,220.04 = 15,845.84/x
  3. Step 3: Cross multiply
    28,421.20x = 39,220.04 × 15,845.84
  4. Step 4: Simplify right side
    28,421.20x = 621,474,478.63
  5. Step 5: Solve for x
    x = 621,474,478.63/28,421.20
  6. Step 6: Final answer
    x = 21,866.58

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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.