Home / 20,749.32-30,991.67-18,771.90

Finding the Fourth Proportional to 20,749.32, 30,991.67 and 18,771.90

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Solution

The fourth proportional to 20,749.32, 30,991.67 and 18,771.90 is: 28,038.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.32 : 30,991.67 = 18,771.90 : x
  2. Step 2: Convert to fraction form
    20,749.32/30,991.67 = 18,771.90/x
  3. Step 3: Cross multiply
    20,749.32x = 30,991.67 × 18,771.90
  4. Step 4: Simplify right side
    20,749.32x = 581,772,281.26
  5. Step 5: Solve for x
    x = 581,772,281.26/20,749.32
  6. Step 6: Final answer
    x = 28,038.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.