Home / 13,458.51-20,156.45-12,991.32

Finding the Fourth Proportional to 13,458.51, 20,156.45 and 12,991.32

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Solution

The fourth proportional to 13,458.51, 20,156.45 and 12,991.32 is: 19,456.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.51 : 20,156.45 = 12,991.32 : x
  2. Step 2: Convert to fraction form
    13,458.51/20,156.45 = 12,991.32/x
  3. Step 3: Cross multiply
    13,458.51x = 20,156.45 × 12,991.32
  4. Step 4: Simplify right side
    13,458.51x = 261,858,827.06
  5. Step 5: Solve for x
    x = 261,858,827.06/13,458.51
  6. Step 6: Final answer
    x = 19,456.75

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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.