Home / 15,369.78-21,187.96-13,236.08

Finding the Fourth Proportional to 15,369.78, 21,187.96 and 13,236.08

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Solution

The fourth proportional to 15,369.78, 21,187.96 and 13,236.08 is: 18,246.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,369.78 : 21,187.96 = 13,236.08 : x
  2. Step 2: Convert to fraction form
    15,369.78/21,187.96 = 13,236.08/x
  3. Step 3: Cross multiply
    15,369.78x = 21,187.96 × 13,236.08
  4. Step 4: Simplify right side
    15,369.78x = 280,445,533.60
  5. Step 5: Solve for x
    x = 280,445,533.60/15,369.78
  6. Step 6: Final answer
    x = 18,246.55

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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.