Home / 12,979.40-17,911.57-7,011.07

Finding the Fourth Proportional to 12,979.40, 17,911.57 and 7,011.07

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Solution

The fourth proportional to 12,979.40, 17,911.57 and 7,011.07 is: 9,675.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.40 : 17,911.57 = 7,011.07 : x
  2. Step 2: Convert to fraction form
    12,979.40/17,911.57 = 7,011.07/x
  3. Step 3: Cross multiply
    12,979.40x = 17,911.57 × 7,011.07
  4. Step 4: Simplify right side
    12,979.40x = 125,579,240.41
  5. Step 5: Solve for x
    x = 125,579,240.41/12,979.40
  6. Step 6: Final answer
    x = 9,675.27

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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.