Home / 7,172.72-9,902.40-4,657.06

Finding the Fourth Proportional to 7,172.72, 9,902.40 and 4,657.06

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Solution

The fourth proportional to 7,172.72, 9,902.40 and 4,657.06 is: 6,429.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172.72 : 9,902.40 = 4,657.06 : x
  2. Step 2: Convert to fraction form
    7,172.72/9,902.40 = 4,657.06/x
  3. Step 3: Cross multiply
    7,172.72x = 9,902.40 × 4,657.06
  4. Step 4: Simplify right side
    7,172.72x = 46,116,070.94
  5. Step 5: Solve for x
    x = 46,116,070.94/7,172.72
  6. Step 6: Final answer
    x = 6,429.37

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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.