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Finding the Fourth Proportional to 12,615.08, 18,916.74 and 9,090.36

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Solution

The fourth proportional to 12,615.08, 18,916.74 and 9,090.36 is: 13,631.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,615.08 : 18,916.74 = 9,090.36 : x
  2. Step 2: Convert to fraction form
    12,615.08/18,916.74 = 9,090.36/x
  3. Step 3: Cross multiply
    12,615.08x = 18,916.74 × 9,090.36
  4. Step 4: Simplify right side
    12,615.08x = 171,959,976.63
  5. Step 5: Solve for x
    x = 171,959,976.63/12,615.08
  6. Step 6: Final answer
    x = 13,631.31

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1.5x scale

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.