Home / 20,342.52-28,071.90-11,389.19

Finding the Fourth Proportional to 20,342.52, 28,071.90 and 11,389.19

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Solution

The fourth proportional to 20,342.52, 28,071.90 and 11,389.19 is: 15,716.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.52 : 28,071.90 = 11,389.19 : x
  2. Step 2: Convert to fraction form
    20,342.52/28,071.90 = 11,389.19/x
  3. Step 3: Cross multiply
    20,342.52x = 28,071.90 × 11,389.19
  4. Step 4: Simplify right side
    20,342.52x = 319,716,062.40
  5. Step 5: Solve for x
    x = 319,716,062.40/20,342.52
  6. Step 6: Final answer
    x = 15,716.64

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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.