Home / 18,921.48-26,136.30-15,349.71

Finding the Fourth Proportional to 18,921.48, 26,136.30 and 15,349.71

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Solution

The fourth proportional to 18,921.48, 26,136.30 and 15,349.71 is: 21,202.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.48 : 26,136.30 = 15,349.71 : x
  2. Step 2: Convert to fraction form
    18,921.48/26,136.30 = 15,349.71/x
  3. Step 3: Cross multiply
    18,921.48x = 26,136.30 × 15,349.71
  4. Step 4: Simplify right side
    18,921.48x = 401,184,625.47
  5. Step 5: Solve for x
    x = 401,184,625.47/18,921.48
  6. Step 6: Final answer
    x = 21,202.60

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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.