Home / 20,779.65-31,169.48-9,090.14

Finding the Fourth Proportional to 20,779.65, 31,169.48 and 9,090.14

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Solution

The fourth proportional to 20,779.65, 31,169.48 and 9,090.14 is: 13,635.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.65 : 31,169.48 = 9,090.14 : x
  2. Step 2: Convert to fraction form
    20,779.65/31,169.48 = 9,090.14/x
  3. Step 3: Cross multiply
    20,779.65x = 31,169.48 × 9,090.14
  4. Step 4: Simplify right side
    20,779.65x = 283,334,735.63
  5. Step 5: Solve for x
    x = 283,334,735.63/20,779.65
  6. Step 6: Final answer
    x = 13,635.20

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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.