Home / 21,007.45-28,993.65-13,453.39

Finding the Fourth Proportional to 21,007.45, 28,993.65 and 13,453.39

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Solution

The fourth proportional to 21,007.45, 28,993.65 and 13,453.39 is: 18,567.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.45 : 28,993.65 = 13,453.39 : x
  2. Step 2: Convert to fraction form
    21,007.45/28,993.65 = 13,453.39/x
  3. Step 3: Cross multiply
    21,007.45x = 28,993.65 × 13,453.39
  4. Step 4: Simplify right side
    21,007.45x = 390,062,866.77
  5. Step 5: Solve for x
    x = 390,062,866.77/21,007.45
  6. Step 6: Final answer
    x = 18,567.83

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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.