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Finding the Fourth Proportional to 4,748.55, 7,128.09 and 2,802.12

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Solution

The fourth proportional to 4,748.55, 7,128.09 and 2,802.12 is: 4,206.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,748.55 : 7,128.09 = 2,802.12 : x
  2. Step 2: Convert to fraction form
    4,748.55/7,128.09 = 2,802.12/x
  3. Step 3: Cross multiply
    4,748.55x = 7,128.09 × 2,802.12
  4. Step 4: Simplify right side
    4,748.55x = 19,973,763.55
  5. Step 5: Solve for x
    x = 19,973,763.55/4,748.55
  6. Step 6: Final answer
    x = 4,206.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.