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Finding the Fourth Proportional to 12,356.64, 17,047.53 and 7,879.37

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Solution

The fourth proportional to 12,356.64, 17,047.53 and 7,879.37 is: 10,870.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,356.64 : 17,047.53 = 7,879.37 : x
  2. Step 2: Convert to fraction form
    12,356.64/17,047.53 = 7,879.37/x
  3. Step 3: Cross multiply
    12,356.64x = 17,047.53 × 7,879.37
  4. Step 4: Simplify right side
    12,356.64x = 134,323,711.22
  5. Step 5: Solve for x
    x = 134,323,711.22/12,356.64
  6. Step 6: Final answer
    x = 10,870.57

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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.