Home / 20,904.66-28,846.51-12,405.32

Finding the Fourth Proportional to 20,904.66, 28,846.51 and 12,405.32

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Solution

The fourth proportional to 20,904.66, 28,846.51 and 12,405.32 is: 17,118.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,904.66 : 28,846.51 = 12,405.32 : x
  2. Step 2: Convert to fraction form
    20,904.66/28,846.51 = 12,405.32/x
  3. Step 3: Cross multiply
    20,904.66x = 28,846.51 × 12,405.32
  4. Step 4: Simplify right side
    20,904.66x = 357,850,187.43
  5. Step 5: Solve for x
    x = 357,850,187.43/20,904.66
  6. Step 6: Final answer
    x = 17,118.20

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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.