Home / 30,961.70-42,733.95-20,352.32

Finding the Fourth Proportional to 30,961.70, 42,733.95 and 20,352.32

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Solution

The fourth proportional to 30,961.70, 42,733.95 and 20,352.32 is: 28,090.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,961.70 : 42,733.95 = 20,352.32 : x
  2. Step 2: Convert to fraction form
    30,961.70/42,733.95 = 20,352.32/x
  3. Step 3: Cross multiply
    30,961.70x = 42,733.95 × 20,352.32
  4. Step 4: Simplify right side
    30,961.70x = 869,735,025.26
  5. Step 5: Solve for x
    x = 869,735,025.26/30,961.70
  6. Step 6: Final answer
    x = 28,090.67

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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.