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Finding the Fourth Proportional to 56,388.99, 84,556.48 and 18,938.67

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Solution

The fourth proportional to 56,388.99, 84,556.48 and 18,938.67 is: 28,398.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,388.99 : 84,556.48 = 18,938.67 : x
  2. Step 2: Convert to fraction form
    56,388.99/84,556.48 = 18,938.67/x
  3. Step 3: Cross multiply
    56,388.99x = 84,556.48 × 18,938.67
  4. Step 4: Simplify right side
    56,388.99x = 1,601,386,942.16
  5. Step 5: Solve for x
    x = 1,601,386,942.16/56,388.99
  6. Step 6: Final answer
    x = 28,398.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.