Home / 20,271.90-27,975.22-11,319.40

Finding the Fourth Proportional to 20,271.90, 27,975.22 and 11,319.40

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Solution

The fourth proportional to 20,271.90, 27,975.22 and 11,319.40 is: 15,620.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271.90 : 27,975.22 = 11,319.40 : x
  2. Step 2: Convert to fraction form
    20,271.90/27,975.22 = 11,319.40/x
  3. Step 3: Cross multiply
    20,271.90x = 27,975.22 × 11,319.40
  4. Step 4: Simplify right side
    20,271.90x = 316,662,711.94
  5. Step 5: Solve for x
    x = 316,662,711.94/20,271.90
  6. Step 6: Final answer
    x = 15,620.77

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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.