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Finding the Fourth Proportional to 20,295, 28,012.05 and 12,342.51

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Solution

The fourth proportional to 20,295, 28,012.05 and 12,342.51 is: 17,035.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295 : 28,012.05 = 12,342.51 : x
  2. Step 2: Convert to fraction form
    20,295/28,012.05 = 12,342.51/x
  3. Step 3: Cross multiply
    20,295x = 28,012.05 × 12,342.51
  4. Step 4: Simplify right side
    20,295x = 345,739,007.25
  5. Step 5: Solve for x
    x = 345,739,007.25/20,295
  6. Step 6: Final answer
    x = 17,035.67

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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.