Home / 20,667.39-30,985.48-10,661.41

Finding the Fourth Proportional to 20,667.39, 30,985.48 and 10,661.41

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Solution

The fourth proportional to 20,667.39, 30,985.48 and 10,661.41 is: 15,984.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.39 : 30,985.48 = 10,661.41 : x
  2. Step 2: Convert to fraction form
    20,667.39/30,985.48 = 10,661.41/x
  3. Step 3: Cross multiply
    20,667.39x = 30,985.48 × 10,661.41
  4. Step 4: Simplify right side
    20,667.39x = 330,348,958.39
  5. Step 5: Solve for x
    x = 330,348,958.39/20,667.39
  6. Step 6: Final answer
    x = 15,984.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.