Home / 20,747-28,631.18-11,315.80

Finding the Fourth Proportional to 20,747, 28,631.18 and 11,315.80

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Solution

The fourth proportional to 20,747, 28,631.18 and 11,315.80 is: 15,615.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747 : 28,631.18 = 11,315.80 : x
  2. Step 2: Convert to fraction form
    20,747/28,631.18 = 11,315.80/x
  3. Step 3: Cross multiply
    20,747x = 28,631.18 × 11,315.80
  4. Step 4: Simplify right side
    20,747x = 323,984,706.64
  5. Step 5: Solve for x
    x = 323,984,706.64/20,747
  6. Step 6: Final answer
    x = 15,615.98

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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.