Home / 20,315.54-28,052.75-12,774.49

Finding the Fourth Proportional to 20,315.54, 28,052.75 and 12,774.49

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Solution

The fourth proportional to 20,315.54, 28,052.75 and 12,774.49 is: 17,639.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.54 : 28,052.75 = 12,774.49 : x
  2. Step 2: Convert to fraction form
    20,315.54/28,052.75 = 12,774.49/x
  3. Step 3: Cross multiply
    20,315.54x = 28,052.75 × 12,774.49
  4. Step 4: Simplify right side
    20,315.54x = 358,359,536.15
  5. Step 5: Solve for x
    x = 358,359,536.15/20,315.54
  6. Step 6: Final answer
    x = 17,639.67

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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.