Home / 12,838.08-17,715.84-7,172.48

Finding the Fourth Proportional to 12,838.08, 17,715.84 and 7,172.48

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Solution

The fourth proportional to 12,838.08, 17,715.84 and 7,172.48 is: 9,897.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,838.08 : 17,715.84 = 7,172.48 : x
  2. Step 2: Convert to fraction form
    12,838.08/17,715.84 = 7,172.48/x
  3. Step 3: Cross multiply
    12,838.08x = 17,715.84 × 7,172.48
  4. Step 4: Simplify right side
    12,838.08x = 127,066,508.08
  5. Step 5: Solve for x
    x = 127,066,508.08/12,838.08
  6. Step 6: Final answer
    x = 9,897.63

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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.