Home / 21,750.70-30,015.94-12,321.08

Finding the Fourth Proportional to 21,750.70, 30,015.94 and 12,321.08

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Solution

The fourth proportional to 21,750.70, 30,015.94 and 12,321.08 is: 17,003.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.70 : 30,015.94 = 12,321.08 : x
  2. Step 2: Convert to fraction form
    21,750.70/30,015.94 = 12,321.08/x
  3. Step 3: Cross multiply
    21,750.70x = 30,015.94 × 12,321.08
  4. Step 4: Simplify right side
    21,750.70x = 369,828,798.02
  5. Step 5: Solve for x
    x = 369,828,798.02/21,750.70
  6. Step 6: Final answer
    x = 17,003.08

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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.