Home / 18,370.86-25,351.74-9,987.36

Finding the Fourth Proportional to 18,370.86, 25,351.74 and 9,987.36

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Solution

The fourth proportional to 18,370.86, 25,351.74 and 9,987.36 is: 13,782.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,370.86 : 25,351.74 = 9,987.36 : x
  2. Step 2: Convert to fraction form
    18,370.86/25,351.74 = 9,987.36/x
  3. Step 3: Cross multiply
    18,370.86x = 25,351.74 × 9,987.36
  4. Step 4: Simplify right side
    18,370.86x = 253,196,954.01
  5. Step 5: Solve for x
    x = 253,196,954.01/18,370.86
  6. Step 6: Final answer
    x = 13,782.53

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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.