Home / 12,828.56-17,703.36-7,239.52

Finding the Fourth Proportional to 12,828.56, 17,703.36 and 7,239.52

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Solution

The fourth proportional to 12,828.56, 17,703.36 and 7,239.52 is: 9,990.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,828.56 : 17,703.36 = 7,239.52 : x
  2. Step 2: Convert to fraction form
    12,828.56/17,703.36 = 7,239.52/x
  3. Step 3: Cross multiply
    12,828.56x = 17,703.36 × 7,239.52
  4. Step 4: Simplify right side
    12,828.56x = 128,163,828.79
  5. Step 5: Solve for x
    x = 128,163,828.79/12,828.56
  6. Step 6: Final answer
    x = 9,990.51

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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.