Home / 28,363.50-39,142.98-15,788.25

Finding the Fourth Proportional to 28,363.50, 39,142.98 and 15,788.25

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Solution

The fourth proportional to 28,363.50, 39,142.98 and 15,788.25 is: 21,788.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,363.50 : 39,142.98 = 15,788.25 : x
  2. Step 2: Convert to fraction form
    28,363.50/39,142.98 = 15,788.25/x
  3. Step 3: Cross multiply
    28,363.50x = 39,142.98 × 15,788.25
  4. Step 4: Simplify right side
    28,363.50x = 617,999,153.99
  5. Step 5: Solve for x
    x = 617,999,153.99/28,363.50
  6. Step 6: Final answer
    x = 21,788.54

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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.