Home / 20,875.16-28,806.63-11,920.91

Finding the Fourth Proportional to 20,875.16, 28,806.63 and 11,920.91

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Solution

The fourth proportional to 20,875.16, 28,806.63 and 11,920.91 is: 16,450.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.16 : 28,806.63 = 11,920.91 : x
  2. Step 2: Convert to fraction form
    20,875.16/28,806.63 = 11,920.91/x
  3. Step 3: Cross multiply
    20,875.16x = 28,806.63 × 11,920.91
  4. Step 4: Simplify right side
    20,875.16x = 343,401,099.60
  5. Step 5: Solve for x
    x = 343,401,099.60/20,875.16
  6. Step 6: Final answer
    x = 16,450.23

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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.