Home / 19,980.63-29,970.96-5,188.31

Finding the Fourth Proportional to 19,980.63, 29,970.96 and 5,188.31

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Solution

The fourth proportional to 19,980.63, 29,970.96 and 5,188.31 is: 7,782.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.63 : 29,970.96 = 5,188.31 : x
  2. Step 2: Convert to fraction form
    19,980.63/29,970.96 = 5,188.31/x
  3. Step 3: Cross multiply
    19,980.63x = 29,970.96 × 5,188.31
  4. Step 4: Simplify right side
    19,980.63x = 155,498,481.62
  5. Step 5: Solve for x
    x = 155,498,481.62/19,980.63
  6. Step 6: Final answer
    x = 7,782.46

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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.