Home / 15,663.98-21,603.70-13,771.54

Finding the Fourth Proportional to 15,663.98, 21,603.70 and 13,771.54

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Solution

The fourth proportional to 15,663.98, 21,603.70 and 13,771.54 is: 18,993.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,663.98 : 21,603.70 = 13,771.54 : x
  2. Step 2: Convert to fraction form
    15,663.98/21,603.70 = 13,771.54/x
  3. Step 3: Cross multiply
    15,663.98x = 21,603.70 × 13,771.54
  4. Step 4: Simplify right side
    15,663.98x = 297,516,218.70
  5. Step 5: Solve for x
    x = 297,516,218.70/15,663.98
  6. Step 6: Final answer
    x = 18,993.65

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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.