Home / 20,436.81-28,203.29-11,483.77

Finding the Fourth Proportional to 20,436.81, 28,203.29 and 11,483.77

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Solution

The fourth proportional to 20,436.81, 28,203.29 and 11,483.77 is: 15,847.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,436.81 : 28,203.29 = 11,483.77 : x
  2. Step 2: Convert to fraction form
    20,436.81/28,203.29 = 11,483.77/x
  3. Step 3: Cross multiply
    20,436.81x = 28,203.29 × 11,483.77
  4. Step 4: Simplify right side
    20,436.81x = 323,880,095.60
  5. Step 5: Solve for x
    x = 323,880,095.60/20,436.81
  6. Step 6: Final answer
    x = 15,847.88

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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.