Home / 31,720.64-43,779.14-18,289.26

Finding the Fourth Proportional to 31,720.64, 43,779.14 and 18,289.26

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Solution

The fourth proportional to 31,720.64, 43,779.14 and 18,289.26 is: 25,241.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,720.64 : 43,779.14 = 18,289.26 : x
  2. Step 2: Convert to fraction form
    31,720.64/43,779.14 = 18,289.26/x
  3. Step 3: Cross multiply
    31,720.64x = 43,779.14 × 18,289.26
  4. Step 4: Simplify right side
    31,720.64x = 800,688,074.04
  5. Step 5: Solve for x
    x = 800,688,074.04/31,720.64
  6. Step 6: Final answer
    x = 25,241.86

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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.