Home / 20,514.10-28,308.90-12,556.30

Finding the Fourth Proportional to 20,514.10, 28,308.90 and 12,556.30

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Solution

The fourth proportional to 20,514.10, 28,308.90 and 12,556.30 is: 17,327.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,514.10 : 28,308.90 = 12,556.30 : x
  2. Step 2: Convert to fraction form
    20,514.10/28,308.90 = 12,556.30/x
  3. Step 3: Cross multiply
    20,514.10x = 28,308.90 × 12,556.30
  4. Step 4: Simplify right side
    20,514.10x = 355,455,041.07
  5. Step 5: Solve for x
    x = 355,455,041.07/20,514.10
  6. Step 6: Final answer
    x = 17,327.35

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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.