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Finding the Fourth Proportional to 19,539.99, 29,309.56 and 4,748.99

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Solution

The fourth proportional to 19,539.99, 29,309.56 and 4,748.99 is: 7,123.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,539.99 : 29,309.56 = 4,748.99 : x
  2. Step 2: Convert to fraction form
    19,539.99/29,309.56 = 4,748.99/x
  3. Step 3: Cross multiply
    19,539.99x = 29,309.56 × 4,748.99
  4. Step 4: Simplify right side
    19,539.99x = 139,190,648.92
  5. Step 5: Solve for x
    x = 139,190,648.92/19,539.99
  6. Step 6: Final answer
    x = 7,123.37

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1.5x scale

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.