Home / 28,512.23-39,345.28-15,764.67

Finding the Fourth Proportional to 28,512.23, 39,345.28 and 15,764.67

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Solution

The fourth proportional to 28,512.23, 39,345.28 and 15,764.67 is: 21,754.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.23 : 39,345.28 = 15,764.67 : x
  2. Step 2: Convert to fraction form
    28,512.23/39,345.28 = 15,764.67/x
  3. Step 3: Cross multiply
    28,512.23x = 39,345.28 × 15,764.67
  4. Step 4: Simplify right side
    28,512.23x = 620,265,315.85
  5. Step 5: Solve for x
    x = 620,265,315.85/28,512.23
  6. Step 6: Final answer
    x = 21,754.36

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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.