Home / 20,747.94-28,631.29-11,315.94

Finding the Fourth Proportional to 20,747.94, 28,631.29 and 11,315.94

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Solution

The fourth proportional to 20,747.94, 28,631.29 and 11,315.94 is: 15,615.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.94 : 28,631.29 = 11,315.94 : x
  2. Step 2: Convert to fraction form
    20,747.94/28,631.29 = 11,315.94/x
  3. Step 3: Cross multiply
    20,747.94x = 28,631.29 × 11,315.94
  4. Step 4: Simplify right side
    20,747.94x = 323,989,959.76
  5. Step 5: Solve for x
    x = 323,989,959.76/20,747.94
  6. Step 6: Final answer
    x = 15,615.52

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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.