Home / 12,689.36-17,511.30-7,100.36

Finding the Fourth Proportional to 12,689.36, 17,511.30 and 7,100.36

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Solution

The fourth proportional to 12,689.36, 17,511.30 and 7,100.36 is: 9,798.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.36 : 17,511.30 = 7,100.36 : x
  2. Step 2: Convert to fraction form
    12,689.36/17,511.30 = 7,100.36/x
  3. Step 3: Cross multiply
    12,689.36x = 17,511.30 × 7,100.36
  4. Step 4: Simplify right side
    12,689.36x = 124,336,534.07
  5. Step 5: Solve for x
    x = 124,336,534.07/12,689.36
  6. Step 6: Final answer
    x = 9,798.49

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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.