Home / 20,701.78-28,573.91-12,750.67

Finding the Fourth Proportional to 20,701.78, 28,573.91 and 12,750.67

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Solution

The fourth proportional to 20,701.78, 28,573.91 and 12,750.67 is: 17,599.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,701.78 : 28,573.91 = 12,750.67 : x
  2. Step 2: Convert to fraction form
    20,701.78/28,573.91 = 12,750.67/x
  3. Step 3: Cross multiply
    20,701.78x = 28,573.91 × 12,750.67
  4. Step 4: Simplify right side
    20,701.78x = 364,336,427.79
  5. Step 5: Solve for x
    x = 364,336,427.79/20,701.78
  6. Step 6: Final answer
    x = 17,599.28

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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.