Home / 20,430.14-28,194.01-11,478.62

Finding the Fourth Proportional to 20,430.14, 28,194.01 and 11,478.62

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Solution

The fourth proportional to 20,430.14, 28,194.01 and 11,478.62 is: 15,840.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.14 : 28,194.01 = 11,478.62 : x
  2. Step 2: Convert to fraction form
    20,430.14/28,194.01 = 11,478.62/x
  3. Step 3: Cross multiply
    20,430.14x = 28,194.01 × 11,478.62
  4. Step 4: Simplify right side
    20,430.14x = 323,628,368.85
  5. Step 5: Solve for x
    x = 323,628,368.85/20,430.14
  6. Step 6: Final answer
    x = 15,840.74

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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.