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Finding the Fourth Proportional to 12,456.47, 17,189.93 and 6,867.47

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Solution

The fourth proportional to 12,456.47, 17,189.93 and 6,867.47 is: 9,477.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,456.47 : 17,189.93 = 6,867.47 : x
  2. Step 2: Convert to fraction form
    12,456.47/17,189.93 = 6,867.47/x
  3. Step 3: Cross multiply
    12,456.47x = 17,189.93 × 6,867.47
  4. Step 4: Simplify right side
    12,456.47x = 118,051,285.63
  5. Step 5: Solve for x
    x = 118,051,285.63/12,456.47
  6. Step 6: Final answer
    x = 9,477.11

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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.