Home / 20,346.48-28,078.40-11,394.76

Finding the Fourth Proportional to 20,346.48, 28,078.40 and 11,394.76

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Solution

The fourth proportional to 20,346.48, 28,078.40 and 11,394.76 is: 15,724.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,346.48 : 28,078.40 = 11,394.76 : x
  2. Step 2: Convert to fraction form
    20,346.48/28,078.40 = 11,394.76/x
  3. Step 3: Cross multiply
    20,346.48x = 28,078.40 × 11,394.76
  4. Step 4: Simplify right side
    20,346.48x = 319,946,629.18
  5. Step 5: Solve for x
    x = 319,946,629.18/20,346.48
  6. Step 6: Final answer
    x = 15,724.91

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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.