Home / 20,263.90-27,977.20-12,720.58

Finding the Fourth Proportional to 20,263.90, 27,977.20 and 12,720.58

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Solution

The fourth proportional to 20,263.90, 27,977.20 and 12,720.58 is: 17,562.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,263.90 : 27,977.20 = 12,720.58 : x
  2. Step 2: Convert to fraction form
    20,263.90/27,977.20 = 12,720.58/x
  3. Step 3: Cross multiply
    20,263.90x = 27,977.20 × 12,720.58
  4. Step 4: Simplify right side
    20,263.90x = 355,886,210.78
  5. Step 5: Solve for x
    x = 355,886,210.78/20,263.90
  6. Step 6: Final answer
    x = 17,562.57

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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.