Home / 20,969.76-28,938.28-12,586.26

Finding the Fourth Proportional to 20,969.76, 28,938.28 and 12,586.26

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Solution

The fourth proportional to 20,969.76, 28,938.28 and 12,586.26 is: 17,369.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.76 : 28,938.28 = 12,586.26 : x
  2. Step 2: Convert to fraction form
    20,969.76/28,938.28 = 12,586.26/x
  3. Step 3: Cross multiply
    20,969.76x = 28,938.28 × 12,586.26
  4. Step 4: Simplify right side
    20,969.76x = 364,224,716.03
  5. Step 5: Solve for x
    x = 364,224,716.03/20,969.76
  6. Step 6: Final answer
    x = 17,369.05

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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.