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Finding the Fourth Proportional to 12,957.31, 17,879.80 and 7,291.93

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Solution

The fourth proportional to 12,957.31, 17,879.80 and 7,291.93 is: 10,062.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,957.31 : 17,879.80 = 7,291.93 : x
  2. Step 2: Convert to fraction form
    12,957.31/17,879.80 = 7,291.93/x
  3. Step 3: Cross multiply
    12,957.31x = 17,879.80 × 7,291.93
  4. Step 4: Simplify right side
    12,957.31x = 130,378,250.01
  5. Step 5: Solve for x
    x = 130,378,250.01/12,957.31
  6. Step 6: Final answer
    x = 10,062.14

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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.