Home / 20,343.52-28,073.28-11,390.19

Finding the Fourth Proportional to 20,343.52, 28,073.28 and 11,390.19

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Solution

The fourth proportional to 20,343.52, 28,073.28 and 11,390.19 is: 15,718.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.52 : 28,073.28 = 11,390.19 : x
  2. Step 2: Convert to fraction form
    20,343.52/28,073.28 = 11,390.19/x
  3. Step 3: Cross multiply
    20,343.52x = 28,073.28 × 11,390.19
  4. Step 4: Simplify right side
    20,343.52x = 319,759,993.12
  5. Step 5: Solve for x
    x = 319,759,993.12/20,343.52
  6. Step 6: Final answer
    x = 15,718.03

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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.