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Finding the Fourth Proportional to 19,146.27, 28,719.31 and 6,666.20

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Solution

The fourth proportional to 19,146.27, 28,719.31 and 6,666.20 is: 9,999.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,146.27 : 28,719.31 = 6,666.20 : x
  2. Step 2: Convert to fraction form
    19,146.27/28,719.31 = 6,666.20/x
  3. Step 3: Cross multiply
    19,146.27x = 28,719.31 × 6,666.20
  4. Step 4: Simplify right side
    19,146.27x = 191,448,664.32
  5. Step 5: Solve for x
    x = 191,448,664.32/19,146.27
  6. Step 6: Final answer
    x = 9,999.27

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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.