Home / 18,619.90-27,931.20-11,208.40

Finding the Fourth Proportional to 18,619.90, 27,931.20 and 11,208.40

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Solution

The fourth proportional to 18,619.90, 27,931.20 and 11,208.40 is: 16,813.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.90 : 27,931.20 = 11,208.40 : x
  2. Step 2: Convert to fraction form
    18,619.90/27,931.20 = 11,208.40/x
  3. Step 3: Cross multiply
    18,619.90x = 27,931.20 × 11,208.40
  4. Step 4: Simplify right side
    18,619.90x = 313,064,062.08
  5. Step 5: Solve for x
    x = 313,064,062.08/18,619.90
  6. Step 6: Final answer
    x = 16,813.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.