Home / 20,745-28,628.10-11,313.63

Finding the Fourth Proportional to 20,745, 28,628.10 and 11,313.63

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Solution

The fourth proportional to 20,745, 28,628.10 and 11,313.63 is: 15,612.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745 : 28,628.10 = 11,313.63 : x
  2. Step 2: Convert to fraction form
    20,745/28,628.10 = 11,313.63/x
  3. Step 3: Cross multiply
    20,745x = 28,628.10 × 11,313.63
  4. Step 4: Simplify right side
    20,745x = 323,887,731.00
  5. Step 5: Solve for x
    x = 323,887,731.00/20,745
  6. Step 6: Final answer
    x = 15,612.81

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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.