Home / 28,357.56-39,113.10-20,806.20

Finding the Fourth Proportional to 28,357.56, 39,113.10 and 20,806.20

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Solution

The fourth proportional to 28,357.56, 39,113.10 and 20,806.20 is: 28,697.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.56 : 39,113.10 = 20,806.20 : x
  2. Step 2: Convert to fraction form
    28,357.56/39,113.10 = 20,806.20/x
  3. Step 3: Cross multiply
    28,357.56x = 39,113.10 × 20,806.20
  4. Step 4: Simplify right side
    28,357.56x = 813,794,981.22
  5. Step 5: Solve for x
    x = 813,794,981.22/28,357.56
  6. Step 6: Final answer
    x = 28,697.64

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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.