Home / 18,987.21-26,177.78-13,008.20

Finding the Fourth Proportional to 18,987.21, 26,177.78 and 13,008.20

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Solution

The fourth proportional to 18,987.21, 26,177.78 and 13,008.20 is: 17,934.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.21 : 26,177.78 = 13,008.20 : x
  2. Step 2: Convert to fraction form
    18,987.21/26,177.78 = 13,008.20/x
  3. Step 3: Cross multiply
    18,987.21x = 26,177.78 × 13,008.20
  4. Step 4: Simplify right side
    18,987.21x = 340,525,699.43
  5. Step 5: Solve for x
    x = 340,525,699.43/18,987.21
  6. Step 6: Final answer
    x = 17,934.48

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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.