Home / 20,747.04-28,630.78-11,315.40

Finding the Fourth Proportional to 20,747.04, 28,630.78 and 11,315.40

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Solution

The fourth proportional to 20,747.04, 28,630.78 and 11,315.40 is: 15,615.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.04 : 28,630.78 = 11,315.40 : x
  2. Step 2: Convert to fraction form
    20,747.04/28,630.78 = 11,315.40/x
  3. Step 3: Cross multiply
    20,747.04x = 28,630.78 × 11,315.40
  4. Step 4: Simplify right side
    20,747.04x = 323,968,728.01
  5. Step 5: Solve for x
    x = 323,968,728.01/20,747.04
  6. Step 6: Final answer
    x = 15,615.18

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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.