Home / 21,189.36-31,789.80-7,339.44

Finding the Fourth Proportional to 21,189.36, 31,789.80 and 7,339.44

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Solution

The fourth proportional to 21,189.36, 31,789.80 and 7,339.44 is: 11,011.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.36 : 31,789.80 = 7,339.44 : x
  2. Step 2: Convert to fraction form
    21,189.36/31,789.80 = 7,339.44/x
  3. Step 3: Cross multiply
    21,189.36x = 31,789.80 × 7,339.44
  4. Step 4: Simplify right side
    21,189.36x = 233,319,329.71
  5. Step 5: Solve for x
    x = 233,319,329.71/21,189.36
  6. Step 6: Final answer
    x = 11,011.16

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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.