Home / 19,886.09-27,431.37-12,421.13

Finding the Fourth Proportional to 19,886.09, 27,431.37 and 12,421.13

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Solution

The fourth proportional to 19,886.09, 27,431.37 and 12,421.13 is: 17,134.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,886.09 : 27,431.37 = 12,421.13 : x
  2. Step 2: Convert to fraction form
    19,886.09/27,431.37 = 12,421.13/x
  3. Step 3: Cross multiply
    19,886.09x = 27,431.37 × 12,421.13
  4. Step 4: Simplify right side
    19,886.09x = 340,728,612.85
  5. Step 5: Solve for x
    x = 340,728,612.85/19,886.09
  6. Step 6: Final answer
    x = 17,134.02

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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.