Home / 15,647.48-21,580.95-13,755.04

Finding the Fourth Proportional to 15,647.48, 21,580.95 and 13,755.04

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Solution

The fourth proportional to 15,647.48, 21,580.95 and 13,755.04 is: 18,970.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,647.48 : 21,580.95 = 13,755.04 : x
  2. Step 2: Convert to fraction form
    15,647.48/21,580.95 = 13,755.04/x
  3. Step 3: Cross multiply
    15,647.48x = 21,580.95 × 13,755.04
  4. Step 4: Simplify right side
    15,647.48x = 296,846,776.54
  5. Step 5: Solve for x
    x = 296,846,776.54/15,647.48
  6. Step 6: Final answer
    x = 18,970.90

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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.