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Finding the Fourth Proportional to 15,090.63, 20,824.91 and 8,376.31

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Solution

The fourth proportional to 15,090.63, 20,824.91 and 8,376.31 is: 11,559.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.63 : 20,824.91 = 8,376.31 : x
  2. Step 2: Convert to fraction form
    15,090.63/20,824.91 = 8,376.31/x
  3. Step 3: Cross multiply
    15,090.63x = 20,824.91 × 8,376.31
  4. Step 4: Simplify right side
    15,090.63x = 174,435,901.88
  5. Step 5: Solve for x
    x = 174,435,901.88/15,090.63
  6. Step 6: Final answer
    x = 11,559.22

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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.