Home / 20,556-28,365.12-12,596.40

Finding the Fourth Proportional to 20,556, 28,365.12 and 12,596.40

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Solution

The fourth proportional to 20,556, 28,365.12 and 12,596.40 is: 17,381.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556 : 28,365.12 = 12,596.40 : x
  2. Step 2: Convert to fraction form
    20,556/28,365.12 = 12,596.40/x
  3. Step 3: Cross multiply
    20,556x = 28,365.12 × 12,596.40
  4. Step 4: Simplify right side
    20,556x = 357,298,397.57
  5. Step 5: Solve for x
    x = 357,298,397.57/20,556
  6. Step 6: Final answer
    x = 17,381.71

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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.