Home / 30,683.36-42,363.60-20,626.76

Finding the Fourth Proportional to 30,683.36, 42,363.60 and 20,626.76

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Solution

The fourth proportional to 30,683.36, 42,363.60 and 20,626.76 is: 28,478.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,683.36 : 42,363.60 = 20,626.76 : x
  2. Step 2: Convert to fraction form
    30,683.36/42,363.60 = 20,626.76/x
  3. Step 3: Cross multiply
    30,683.36x = 42,363.60 × 20,626.76
  4. Step 4: Simplify right side
    30,683.36x = 873,823,809.94
  5. Step 5: Solve for x
    x = 873,823,809.94/30,683.36
  6. Step 6: Final answer
    x = 28,478.75

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Half scale
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Double scale
Find fourth proportional to 30,684.36, 42,364.98 and 20,627.76
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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.