Home / 9,151.51-12,628.39-5,172.99

Finding the Fourth Proportional to 9,151.51, 12,628.39 and 5,172.99

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Solution

The fourth proportional to 9,151.51, 12,628.39 and 5,172.99 is: 7,138.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,151.51 : 12,628.39 = 5,172.99 : x
  2. Step 2: Convert to fraction form
    9,151.51/12,628.39 = 5,172.99/x
  3. Step 3: Cross multiply
    9,151.51x = 12,628.39 × 5,172.99
  4. Step 4: Simplify right side
    9,151.51x = 65,326,535.19
  5. Step 5: Solve for x
    x = 65,326,535.19/9,151.51
  6. Step 6: Final answer
    x = 7,138.33

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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.