Home / 20,993.58-28,970.64-11,562.30

Finding the Fourth Proportional to 20,993.58, 28,970.64 and 11,562.30

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Solution

The fourth proportional to 20,993.58, 28,970.64 and 11,562.30 is: 15,955.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.58 : 28,970.64 = 11,562.30 : x
  2. Step 2: Convert to fraction form
    20,993.58/28,970.64 = 11,562.30/x
  3. Step 3: Cross multiply
    20,993.58x = 28,970.64 × 11,562.30
  4. Step 4: Simplify right side
    20,993.58x = 334,967,230.87
  5. Step 5: Solve for x
    x = 334,967,230.87/20,993.58
  6. Step 6: Final answer
    x = 15,955.70

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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.