Home / 28,328.96-39,109.98-21,561.44

Finding the Fourth Proportional to 28,328.96, 39,109.98 and 21,561.44

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Solution

The fourth proportional to 28,328.96, 39,109.98 and 21,561.44 is: 29,766.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,328.96 : 39,109.98 = 21,561.44 : x
  2. Step 2: Convert to fraction form
    28,328.96/39,109.98 = 21,561.44/x
  3. Step 3: Cross multiply
    28,328.96x = 39,109.98 × 21,561.44
  4. Step 4: Simplify right side
    28,328.96x = 843,267,487.17
  5. Step 5: Solve for x
    x = 843,267,487.17/28,328.96
  6. Step 6: Final answer
    x = 29,766.98

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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.