Home / 28,420.98-39,231.72-22,355.52

Finding the Fourth Proportional to 28,420.98, 39,231.72 and 22,355.52

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Solution

The fourth proportional to 28,420.98, 39,231.72 and 22,355.52 is: 30,859.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.98 : 39,231.72 = 22,355.52 : x
  2. Step 2: Convert to fraction form
    28,420.98/39,231.72 = 22,355.52/x
  3. Step 3: Cross multiply
    28,420.98x = 39,231.72 × 22,355.52
  4. Step 4: Simplify right side
    28,420.98x = 877,045,501.09
  5. Step 5: Solve for x
    x = 877,045,501.09/28,420.98
  6. Step 6: Final answer
    x = 30,859.09

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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.