Home / 12,971.38-19,431.18-9,999.43

Finding the Fourth Proportional to 12,971.38, 19,431.18 and 9,999.43

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Solution

The fourth proportional to 12,971.38, 19,431.18 and 9,999.43 is: 14,979.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,971.38 : 19,431.18 = 9,999.43 : x
  2. Step 2: Convert to fraction form
    12,971.38/19,431.18 = 9,999.43/x
  3. Step 3: Cross multiply
    12,971.38x = 19,431.18 × 9,999.43
  4. Step 4: Simplify right side
    12,971.38x = 194,300,724.23
  5. Step 5: Solve for x
    x = 194,300,724.23/12,971.38
  6. Step 6: Final answer
    x = 14,979.19

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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.