Home / 20,837.45-28,756.42-11,886.35

Finding the Fourth Proportional to 20,837.45, 28,756.42 and 11,886.35

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Solution

The fourth proportional to 20,837.45, 28,756.42 and 11,886.35 is: 16,403.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.45 : 28,756.42 = 11,886.35 : x
  2. Step 2: Convert to fraction form
    20,837.45/28,756.42 = 11,886.35/x
  3. Step 3: Cross multiply
    20,837.45x = 28,756.42 × 11,886.35
  4. Step 4: Simplify right side
    20,837.45x = 341,808,699.37
  5. Step 5: Solve for x
    x = 341,808,699.37/20,837.45
  6. Step 6: Final answer
    x = 16,403.57

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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.