Home / 15,505.63-21,399.62-9,218.00

Finding the Fourth Proportional to 15,505.63, 21,399.62 and 9,218.00

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Solution

The fourth proportional to 15,505.63, 21,399.62 and 9,218.00 is: 12,721.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.63 : 21,399.62 = 9,218.00 : x
  2. Step 2: Convert to fraction form
    15,505.63/21,399.62 = 9,218.00/x
  3. Step 3: Cross multiply
    15,505.63x = 21,399.62 × 9,218.00
  4. Step 4: Simplify right side
    15,505.63x = 197,261,704.57
  5. Step 5: Solve for x
    x = 197,261,704.57/15,505.63
  6. Step 6: Final answer
    x = 12,721.94

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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.