Home / 28,421.75-39,222.02-15,846.50

Finding the Fourth Proportional to 28,421.75, 39,222.02 and 15,846.50

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Solution

The fourth proportional to 28,421.75, 39,222.02 and 15,846.50 is: 21,868.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.75 : 39,222.02 = 15,846.50 : x
  2. Step 2: Convert to fraction form
    28,421.75/39,222.02 = 15,846.50/x
  3. Step 3: Cross multiply
    28,421.75x = 39,222.02 × 15,846.50
  4. Step 4: Simplify right side
    28,421.75x = 621,531,739.93
  5. Step 5: Solve for x
    x = 621,531,739.93/28,421.75
  6. Step 6: Final answer
    x = 21,868.17

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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.