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Finding the Fourth Proportional to 28,416.99, 39,214.55 and 15,670.71

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Solution

The fourth proportional to 28,416.99, 39,214.55 and 15,670.71 is: 21,625.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,416.99 : 39,214.55 = 15,670.71 : x
  2. Step 2: Convert to fraction form
    28,416.99/39,214.55 = 15,670.71/x
  3. Step 3: Cross multiply
    28,416.99x = 39,214.55 × 15,670.71
  4. Step 4: Simplify right side
    28,416.99x = 614,520,033.04
  5. Step 5: Solve for x
    x = 614,520,033.04/28,416.99
  6. Step 6: Final answer
    x = 21,625.09

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.