Home / 21,947.02-30,307.79-20,751.55

Finding the Fourth Proportional to 21,947.02, 30,307.79 and 20,751.55

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Solution

The fourth proportional to 21,947.02, 30,307.79 and 20,751.55 is: 28,656.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,947.02 : 30,307.79 = 20,751.55 : x
  2. Step 2: Convert to fraction form
    21,947.02/30,307.79 = 20,751.55/x
  3. Step 3: Cross multiply
    21,947.02x = 30,307.79 × 20,751.55
  4. Step 4: Simplify right side
    21,947.02x = 628,933,619.57
  5. Step 5: Solve for x
    x = 628,933,619.57/21,947.02
  6. Step 6: Final answer
    x = 28,656.90

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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.