Home / 15,338.30-21,137.57-13,213.16

Finding the Fourth Proportional to 15,338.30, 21,137.57 and 13,213.16

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Solution

The fourth proportional to 15,338.30, 21,137.57 and 13,213.16 is: 18,208.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,338.30 : 21,137.57 = 13,213.16 : x
  2. Step 2: Convert to fraction form
    15,338.30/21,137.57 = 13,213.16/x
  3. Step 3: Cross multiply
    15,338.30x = 21,137.57 × 13,213.16
  4. Step 4: Simplify right side
    15,338.30x = 279,294,094.42
  5. Step 5: Solve for x
    x = 279,294,094.42/15,338.30
  6. Step 6: Final answer
    x = 18,208.93

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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.