Home / 20,740.67-28,624.32-12,679.04

Finding the Fourth Proportional to 20,740.67, 28,624.32 and 12,679.04

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Solution

The fourth proportional to 20,740.67, 28,624.32 and 12,679.04 is: 17,498.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.67 : 28,624.32 = 12,679.04 : x
  2. Step 2: Convert to fraction form
    20,740.67/28,624.32 = 12,679.04/x
  3. Step 3: Cross multiply
    20,740.67x = 28,624.32 × 12,679.04
  4. Step 4: Simplify right side
    20,740.67x = 362,928,969.81
  5. Step 5: Solve for x
    x = 362,928,969.81/20,740.67
  6. Step 6: Final answer
    x = 17,498.42

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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.