Home / 28,358.55-39,188.75-21,272.67

Finding the Fourth Proportional to 28,358.55, 39,188.75 and 21,272.67

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Solution

The fourth proportional to 28,358.55, 39,188.75 and 21,272.67 is: 29,396.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.55 : 39,188.75 = 21,272.67 : x
  2. Step 2: Convert to fraction form
    28,358.55/39,188.75 = 21,272.67/x
  3. Step 3: Cross multiply
    28,358.55x = 39,188.75 × 21,272.67
  4. Step 4: Simplify right side
    28,358.55x = 833,649,240.10
  5. Step 5: Solve for x
    x = 833,649,240.10/28,358.55
  6. Step 6: Final answer
    x = 29,396.75

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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.