Home / 20,533.85-28,336.64-11,581.30

Finding the Fourth Proportional to 20,533.85, 28,336.64 and 11,581.30

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Solution

The fourth proportional to 20,533.85, 28,336.64 and 11,581.30 is: 15,982.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,533.85 : 28,336.64 = 11,581.30 : x
  2. Step 2: Convert to fraction form
    20,533.85/28,336.64 = 11,581.30/x
  3. Step 3: Cross multiply
    20,533.85x = 28,336.64 × 11,581.30
  4. Step 4: Simplify right side
    20,533.85x = 328,174,946.95
  5. Step 5: Solve for x
    x = 328,174,946.95/20,533.85
  6. Step 6: Final answer
    x = 15,982.14

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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.