Home / 20,970.80-28,941.74-15,656.39

Finding the Fourth Proportional to 20,970.80, 28,941.74 and 15,656.39

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Solution

The fourth proportional to 20,970.80, 28,941.74 and 15,656.39 is: 21,607.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.80 : 28,941.74 = 15,656.39 : x
  2. Step 2: Convert to fraction form
    20,970.80/28,941.74 = 15,656.39/x
  3. Step 3: Cross multiply
    20,970.80x = 28,941.74 × 15,656.39
  4. Step 4: Simplify right side
    20,970.80x = 453,122,945.73
  5. Step 5: Solve for x
    x = 453,122,945.73/20,970.80
  6. Step 6: Final answer
    x = 21,607.33

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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.