Home / 21,756.79-30,021.60-12,325.35

Finding the Fourth Proportional to 21,756.79, 30,021.60 and 12,325.35

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Solution

The fourth proportional to 21,756.79, 30,021.60 and 12,325.35 is: 17,007.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,756.79 : 30,021.60 = 12,325.35 : x
  2. Step 2: Convert to fraction form
    21,756.79/30,021.60 = 12,325.35/x
  3. Step 3: Cross multiply
    21,756.79x = 30,021.60 × 12,325.35
  4. Step 4: Simplify right side
    21,756.79x = 370,026,727.56
  5. Step 5: Solve for x
    x = 370,026,727.56/21,756.79
  6. Step 6: Final answer
    x = 17,007.41

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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.