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Finding the Fourth Proportional to 19,999.71, 30,018.40 and 10,146.06

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Solution

The fourth proportional to 19,999.71, 30,018.40 and 10,146.06 is: 15,228.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,999.71 : 30,018.40 = 10,146.06 : x
  2. Step 2: Convert to fraction form
    19,999.71/30,018.40 = 10,146.06/x
  3. Step 3: Cross multiply
    19,999.71x = 30,018.40 × 10,146.06
  4. Step 4: Simplify right side
    19,999.71x = 304,568,462.14
  5. Step 5: Solve for x
    x = 304,568,462.14/19,999.71
  6. Step 6: Final answer
    x = 15,228.64

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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.