Home / 28,421.87-39,221.64-15,676.22

Finding the Fourth Proportional to 28,421.87, 39,221.64 and 15,676.22

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Solution

The fourth proportional to 28,421.87, 39,221.64 and 15,676.22 is: 21,632.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.87 : 39,221.64 = 15,676.22 : x
  2. Step 2: Convert to fraction form
    28,421.87/39,221.64 = 15,676.22/x
  3. Step 3: Cross multiply
    28,421.87x = 39,221.64 × 15,676.22
  4. Step 4: Simplify right side
    28,421.87x = 614,847,155.45
  5. Step 5: Solve for x
    x = 614,847,155.45/28,421.87
  6. Step 6: Final answer
    x = 21,632.89

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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.