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Finding the Fourth Proportional to 19,297.99, 28,931.87 and 7,619.95

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Solution

The fourth proportional to 19,297.99, 28,931.87 and 7,619.95 is: 11,423.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,297.99 : 28,931.87 = 7,619.95 : x
  2. Step 2: Convert to fraction form
    19,297.99/28,931.87 = 7,619.95/x
  3. Step 3: Cross multiply
    19,297.99x = 28,931.87 × 7,619.95
  4. Step 4: Simplify right side
    19,297.99x = 220,459,501.78
  5. Step 5: Solve for x
    x = 220,459,501.78/19,297.99
  6. Step 6: Final answer
    x = 11,423.96

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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.