Home / 15,663.96-21,603.72-13,771.53

Finding the Fourth Proportional to 15,663.96, 21,603.72 and 13,771.53

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Solution

The fourth proportional to 15,663.96, 21,603.72 and 13,771.53 is: 18,993.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,663.96 : 21,603.72 = 13,771.53 : x
  2. Step 2: Convert to fraction form
    15,663.96/21,603.72 = 13,771.53/x
  3. Step 3: Cross multiply
    15,663.96x = 21,603.72 × 13,771.53
  4. Step 4: Simplify right side
    15,663.96x = 297,516,278.09
  5. Step 5: Solve for x
    x = 297,516,278.09/15,663.96
  6. Step 6: Final answer
    x = 18,993.68

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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.