Home / 20,384.51-28,130.64-11,310.49

Finding the Fourth Proportional to 20,384.51, 28,130.64 and 11,310.49

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Solution

The fourth proportional to 20,384.51, 28,130.64 and 11,310.49 is: 15,608.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.51 : 28,130.64 = 11,310.49 : x
  2. Step 2: Convert to fraction form
    20,384.51/28,130.64 = 11,310.49/x
  3. Step 3: Cross multiply
    20,384.51x = 28,130.64 × 11,310.49
  4. Step 4: Simplify right side
    20,384.51x = 318,171,181.76
  5. Step 5: Solve for x
    x = 318,171,181.76/20,384.51
  6. Step 6: Final answer
    x = 15,608.48

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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.