Home / 20,315.45-28,033.05-11,362.77

Finding the Fourth Proportional to 20,315.45, 28,033.05 and 11,362.77

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Solution

The fourth proportional to 20,315.45, 28,033.05 and 11,362.77 is: 15,679.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.45 : 28,033.05 = 11,362.77 : x
  2. Step 2: Convert to fraction form
    20,315.45/28,033.05 = 11,362.77/x
  3. Step 3: Cross multiply
    20,315.45x = 28,033.05 × 11,362.77
  4. Step 4: Simplify right side
    20,315.45x = 318,533,099.55
  5. Step 5: Solve for x
    x = 318,533,099.55/20,315.45
  6. Step 6: Final answer
    x = 15,679.35

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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.