Home / 15,458.89-21,317.55-13,228.15

Finding the Fourth Proportional to 15,458.89, 21,317.55 and 13,228.15

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Solution

The fourth proportional to 15,458.89, 21,317.55 and 13,228.15 is: 18,241.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,458.89 : 21,317.55 = 13,228.15 : x
  2. Step 2: Convert to fraction form
    15,458.89/21,317.55 = 13,228.15/x
  3. Step 3: Cross multiply
    15,458.89x = 21,317.55 × 13,228.15
  4. Step 4: Simplify right side
    15,458.89x = 281,991,749.03
  5. Step 5: Solve for x
    x = 281,991,749.03/15,458.89
  6. Step 6: Final answer
    x = 18,241.40

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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.