Home / 20,319.70-28,040.06-11,365.47

Finding the Fourth Proportional to 20,319.70, 28,040.06 and 11,365.47

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Solution

The fourth proportional to 20,319.70, 28,040.06 and 11,365.47 is: 15,683.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.70 : 28,040.06 = 11,365.47 : x
  2. Step 2: Convert to fraction form
    20,319.70/28,040.06 = 11,365.47/x
  3. Step 3: Cross multiply
    20,319.70x = 28,040.06 × 11,365.47
  4. Step 4: Simplify right side
    20,319.70x = 318,688,403.90
  5. Step 5: Solve for x
    x = 318,688,403.90/20,319.70
  6. Step 6: Final answer
    x = 15,683.72

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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.