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Finding the Fourth Proportional to 12,665.16, 18,987.30 and 9,539.16

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Solution

The fourth proportional to 12,665.16, 18,987.30 and 9,539.16 is: 14,300.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,665.16 : 18,987.30 = 9,539.16 : x
  2. Step 2: Convert to fraction form
    12,665.16/18,987.30 = 9,539.16/x
  3. Step 3: Cross multiply
    12,665.16x = 18,987.30 × 9,539.16
  4. Step 4: Simplify right side
    12,665.16x = 181,122,892.67
  5. Step 5: Solve for x
    x = 181,122,892.67/12,665.16
  6. Step 6: Final answer
    x = 14,300.88

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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.