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Finding the Fourth Proportional to 28,242.99, 38,974.01 and 15,495.89

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Solution

The fourth proportional to 28,242.99, 38,974.01 and 15,495.89 is: 21,383.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,242.99 : 38,974.01 = 15,495.89 : x
  2. Step 2: Convert to fraction form
    28,242.99/38,974.01 = 15,495.89/x
  3. Step 3: Cross multiply
    28,242.99x = 38,974.01 × 15,495.89
  4. Step 4: Simplify right side
    28,242.99x = 603,936,699.47
  5. Step 5: Solve for x
    x = 603,936,699.47/28,242.99
  6. Step 6: Final answer
    x = 21,383.60

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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.