Home / 13,143.14-19,720.16-7,888.26

Finding the Fourth Proportional to 13,143.14, 19,720.16 and 7,888.26

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Solution

The fourth proportional to 13,143.14, 19,720.16 and 7,888.26 is: 11,835.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.14 : 19,720.16 = 7,888.26 : x
  2. Step 2: Convert to fraction form
    13,143.14/19,720.16 = 7,888.26/x
  3. Step 3: Cross multiply
    13,143.14x = 19,720.16 × 7,888.26
  4. Step 4: Simplify right side
    13,143.14x = 155,557,749.32
  5. Step 5: Solve for x
    x = 155,557,749.32/13,143.14
  6. Step 6: Final answer
    x = 11,835.66

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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.