Home / 20,318.68-28,038.18-11,365.48

Finding the Fourth Proportional to 20,318.68, 28,038.18 and 11,365.48

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Solution

The fourth proportional to 20,318.68, 28,038.18 and 11,365.48 is: 15,683.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.68 : 28,038.18 = 11,365.48 : x
  2. Step 2: Convert to fraction form
    20,318.68/28,038.18 = 11,365.48/x
  3. Step 3: Cross multiply
    20,318.68x = 28,038.18 × 11,365.48
  4. Step 4: Simplify right side
    20,318.68x = 318,667,374.03
  5. Step 5: Solve for x
    x = 318,667,374.03/20,318.68
  6. Step 6: Final answer
    x = 15,683.47

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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.