Home / 20,520.88-28,312.52-12,554.80

Finding the Fourth Proportional to 20,520.88, 28,312.52 and 12,554.80

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Solution

The fourth proportional to 20,520.88, 28,312.52 and 12,554.80 is: 17,321.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.88 : 28,312.52 = 12,554.80 : x
  2. Step 2: Convert to fraction form
    20,520.88/28,312.52 = 12,554.80/x
  3. Step 3: Cross multiply
    20,520.88x = 28,312.52 × 12,554.80
  4. Step 4: Simplify right side
    20,520.88x = 355,458,026.10
  5. Step 5: Solve for x
    x = 355,458,026.10/20,520.88
  6. Step 6: Final answer
    x = 17,321.77

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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.