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Finding the Fourth Proportional to 12,804.52, 17,666.20 and 8,615.20

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Solution

The fourth proportional to 12,804.52, 17,666.20 and 8,615.20 is: 11,886.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,804.52 : 17,666.20 = 8,615.20 : x
  2. Step 2: Convert to fraction form
    12,804.52/17,666.20 = 8,615.20/x
  3. Step 3: Cross multiply
    12,804.52x = 17,666.20 × 8,615.20
  4. Step 4: Simplify right side
    12,804.52x = 152,197,846.24
  5. Step 5: Solve for x
    x = 152,197,846.24/12,804.52
  6. Step 6: Final answer
    x = 11,886.26

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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.