Home / 11,857.12-16,362.40-7,140.48

Finding the Fourth Proportional to 11,857.12, 16,362.40 and 7,140.48

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Solution

The fourth proportional to 11,857.12, 16,362.40 and 7,140.48 is: 9,853.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,857.12 : 16,362.40 = 7,140.48 : x
  2. Step 2: Convert to fraction form
    11,857.12/16,362.40 = 7,140.48/x
  3. Step 3: Cross multiply
    11,857.12x = 16,362.40 × 7,140.48
  4. Step 4: Simplify right side
    11,857.12x = 116,835,389.95
  5. Step 5: Solve for x
    x = 116,835,389.95/11,857.12
  6. Step 6: Final answer
    x = 9,853.61

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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.