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Finding the Fourth Proportional to 15,090.52, 20,823.94 and 8,376.15

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Solution

The fourth proportional to 15,090.52, 20,823.94 and 8,376.15 is: 11,558.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.52 : 20,823.94 = 8,376.15 : x
  2. Step 2: Convert to fraction form
    15,090.52/20,823.94 = 8,376.15/x
  3. Step 3: Cross multiply
    15,090.52x = 20,823.94 × 8,376.15
  4. Step 4: Simplify right side
    15,090.52x = 174,424,455.50
  5. Step 5: Solve for x
    x = 174,424,455.50/15,090.52
  6. Step 6: Final answer
    x = 11,558.54

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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.