Home / 15,218.56-21,007.47-13,622.39

Finding the Fourth Proportional to 15,218.56, 21,007.47 and 13,622.39

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Solution

The fourth proportional to 15,218.56, 21,007.47 and 13,622.39 is: 18,804.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,218.56 : 21,007.47 = 13,622.39 : x
  2. Step 2: Convert to fraction form
    15,218.56/21,007.47 = 13,622.39/x
  3. Step 3: Cross multiply
    15,218.56x = 21,007.47 × 13,622.39
  4. Step 4: Simplify right side
    15,218.56x = 286,171,949.25
  5. Step 5: Solve for x
    x = 286,171,949.25/15,218.56
  6. Step 6: Final answer
    x = 18,804.14

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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.