Home / 8,434.80-11,628.36-7,020.54

Finding the Fourth Proportional to 8,434.80, 11,628.36 and 7,020.54

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Solution

The fourth proportional to 8,434.80, 11,628.36 and 7,020.54 is: 9,678.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,434.80 : 11,628.36 = 7,020.54 : x
  2. Step 2: Convert to fraction form
    8,434.80/11,628.36 = 7,020.54/x
  3. Step 3: Cross multiply
    8,434.80x = 11,628.36 × 7,020.54
  4. Step 4: Simplify right side
    8,434.80x = 81,637,366.51
  5. Step 5: Solve for x
    x = 81,637,366.51/8,434.80
  6. Step 6: Final answer
    x = 9,678.64

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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.