Home / 20,288.94-28,016.55-12,748.34

Finding the Fourth Proportional to 20,288.94, 28,016.55 and 12,748.34

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Solution

The fourth proportional to 20,288.94, 28,016.55 and 12,748.34 is: 17,603.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.94 : 28,016.55 = 12,748.34 : x
  2. Step 2: Convert to fraction form
    20,288.94/28,016.55 = 12,748.34/x
  3. Step 3: Cross multiply
    20,288.94x = 28,016.55 × 12,748.34
  4. Step 4: Simplify right side
    20,288.94x = 357,164,364.94
  5. Step 5: Solve for x
    x = 357,164,364.94/20,288.94
  6. Step 6: Final answer
    x = 17,603.89

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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.