Home / 18,128.09-25,017-13,582.70

Finding the Fourth Proportional to 18,128.09, 25,017 and 13,582.70

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Solution

The fourth proportional to 18,128.09, 25,017 and 13,582.70 is: 18,744.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,128.09 : 25,017 = 13,582.70 : x
  2. Step 2: Convert to fraction form
    18,128.09/25,017 = 13,582.70/x
  3. Step 3: Cross multiply
    18,128.09x = 25,017 × 13,582.70
  4. Step 4: Simplify right side
    18,128.09x = 339,798,405.90
  5. Step 5: Solve for x
    x = 339,798,405.90/18,128.09
  6. Step 6: Final answer
    x = 18,744.31

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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.