Home / 28,415.42-39,212.98-15,669.72

Finding the Fourth Proportional to 28,415.42, 39,212.98 and 15,669.72

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Solution

The fourth proportional to 28,415.42, 39,212.98 and 15,669.72 is: 21,624.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.42 : 39,212.98 = 15,669.72 : x
  2. Step 2: Convert to fraction form
    28,415.42/39,212.98 = 15,669.72/x
  3. Step 3: Cross multiply
    28,415.42x = 39,212.98 × 15,669.72
  4. Step 4: Simplify right side
    28,415.42x = 614,456,416.97
  5. Step 5: Solve for x
    x = 614,456,416.97/28,415.42
  6. Step 6: Final answer
    x = 21,624.05

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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.