Home / 20,667.42-28,516.05-13,111.00

Finding the Fourth Proportional to 20,667.42, 28,516.05 and 13,111.00

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Solution

The fourth proportional to 20,667.42, 28,516.05 and 13,111.00 is: 18,090.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.42 : 28,516.05 = 13,111.00 : x
  2. Step 2: Convert to fraction form
    20,667.42/28,516.05 = 13,111.00/x
  3. Step 3: Cross multiply
    20,667.42x = 28,516.05 × 13,111.00
  4. Step 4: Simplify right side
    20,667.42x = 373,873,860.26
  5. Step 5: Solve for x
    x = 373,873,860.26/20,667.42
  6. Step 6: Final answer
    x = 18,090.01

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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.