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Finding the Fourth Proportional to 12,828.56, 17,703.08 and 7,239.52

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Solution

The fourth proportional to 12,828.56, 17,703.08 and 7,239.52 is: 9,990.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,828.56 : 17,703.08 = 7,239.52 : x
  2. Step 2: Convert to fraction form
    12,828.56/17,703.08 = 7,239.52/x
  3. Step 3: Cross multiply
    12,828.56x = 17,703.08 × 7,239.52
  4. Step 4: Simplify right side
    12,828.56x = 128,161,801.72
  5. Step 5: Solve for x
    x = 128,161,801.72/12,828.56
  6. Step 6: Final answer
    x = 9,990.35

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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.