Home / 20,430.55-28,186.81-13,361.01

Finding the Fourth Proportional to 20,430.55, 28,186.81 and 13,361.01

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Solution

The fourth proportional to 20,430.55, 28,186.81 and 13,361.01 is: 18,433.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.55 : 28,186.81 = 13,361.01 : x
  2. Step 2: Convert to fraction form
    20,430.55/28,186.81 = 13,361.01/x
  3. Step 3: Cross multiply
    20,430.55x = 28,186.81 × 13,361.01
  4. Step 4: Simplify right side
    20,430.55x = 376,604,250.28
  5. Step 5: Solve for x
    x = 376,604,250.28/20,430.55
  6. Step 6: Final answer
    x = 18,433.39

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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.