Home / 13,690.36-20,428.01-12,854.44

Finding the Fourth Proportional to 13,690.36, 20,428.01 and 12,854.44

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Solution

The fourth proportional to 13,690.36, 20,428.01 and 12,854.44 is: 19,180.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.36 : 20,428.01 = 12,854.44 : x
  2. Step 2: Convert to fraction form
    13,690.36/20,428.01 = 12,854.44/x
  3. Step 3: Cross multiply
    13,690.36x = 20,428.01 × 12,854.44
  4. Step 4: Simplify right side
    13,690.36x = 262,590,628.86
  5. Step 5: Solve for x
    x = 262,590,628.86/13,690.36
  6. Step 6: Final answer
    x = 19,180.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.