Home / 20,317.68-28,038.20-11,365.20

Finding the Fourth Proportional to 20,317.68, 28,038.20 and 11,365.20

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Solution

The fourth proportional to 20,317.68, 28,038.20 and 11,365.20 is: 15,683.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,317.68 : 28,038.20 = 11,365.20 : x
  2. Step 2: Convert to fraction form
    20,317.68/28,038.20 = 11,365.20/x
  3. Step 3: Cross multiply
    20,317.68x = 28,038.20 × 11,365.20
  4. Step 4: Simplify right side
    20,317.68x = 318,659,750.64
  5. Step 5: Solve for x
    x = 318,659,750.64/20,317.68
  6. Step 6: Final answer
    x = 15,683.87

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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.