Home / 20,430.46-28,192.98-11,478.34

Finding the Fourth Proportional to 20,430.46, 28,192.98 and 11,478.34

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Solution

The fourth proportional to 20,430.46, 28,192.98 and 11,478.34 is: 15,839.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.46 : 28,192.98 = 11,478.34 : x
  2. Step 2: Convert to fraction form
    20,430.46/28,192.98 = 11,478.34/x
  3. Step 3: Cross multiply
    20,430.46x = 28,192.98 × 11,478.34
  4. Step 4: Simplify right side
    20,430.46x = 323,608,610.05
  5. Step 5: Solve for x
    x = 323,608,610.05/20,430.46
  6. Step 6: Final answer
    x = 15,839.52

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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.