Home / 13,991.13-19,302.71-8,538.21

Finding the Fourth Proportional to 13,991.13, 19,302.71 and 8,538.21

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Solution

The fourth proportional to 13,991.13, 19,302.71 and 8,538.21 is: 11,779.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.13 : 19,302.71 = 8,538.21 : x
  2. Step 2: Convert to fraction form
    13,991.13/19,302.71 = 8,538.21/x
  3. Step 3: Cross multiply
    13,991.13x = 19,302.71 × 8,538.21
  4. Step 4: Simplify right side
    13,991.13x = 164,810,548.86
  5. Step 5: Solve for x
    x = 164,810,548.86/13,991.13
  6. Step 6: Final answer
    x = 11,779.65

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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.