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Finding the Fourth Proportional to 7,261.02, 9,954.95 and 7,129.80

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Solution

The fourth proportional to 7,261.02, 9,954.95 and 7,129.80 is: 9,775.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,261.02 : 9,954.95 = 7,129.80 : x
  2. Step 2: Convert to fraction form
    7,261.02/9,954.95 = 7,129.80/x
  3. Step 3: Cross multiply
    7,261.02x = 9,954.95 × 7,129.80
  4. Step 4: Simplify right side
    7,261.02x = 70,976,802.51
  5. Step 5: Solve for x
    x = 70,976,802.51/7,261.02
  6. Step 6: Final answer
    x = 9,775.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.