Home / 20,681.37-28,550.21-12,730.41

Finding the Fourth Proportional to 20,681.37, 28,550.21 and 12,730.41

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Solution

The fourth proportional to 20,681.37, 28,550.21 and 12,730.41 is: 17,574.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.37 : 28,550.21 = 12,730.41 : x
  2. Step 2: Convert to fraction form
    20,681.37/28,550.21 = 12,730.41/x
  3. Step 3: Cross multiply
    20,681.37x = 28,550.21 × 12,730.41
  4. Step 4: Simplify right side
    20,681.37x = 363,455,815.23
  5. Step 5: Solve for x
    x = 363,455,815.23/20,681.37
  6. Step 6: Final answer
    x = 17,574.07

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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.