Home / 20,319.22-28,039.21-11,365.18

Finding the Fourth Proportional to 20,319.22, 28,039.21 and 11,365.18

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Solution

The fourth proportional to 20,319.22, 28,039.21 and 11,365.18 is: 15,683.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.22 : 28,039.21 = 11,365.18 : x
  2. Step 2: Convert to fraction form
    20,319.22/28,039.21 = 11,365.18/x
  3. Step 3: Cross multiply
    20,319.22x = 28,039.21 × 11,365.18
  4. Step 4: Simplify right side
    20,319.22x = 318,670,668.71
  5. Step 5: Solve for x
    x = 318,670,668.71/20,319.22
  6. Step 6: Final answer
    x = 15,683.21

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Half scale
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Double scale
Find fourth proportional to 20,320.22, 28,040.59 and 11,366.18
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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.