Home / 12,021.09-18,015.93-8,700.51

Finding the Fourth Proportional to 12,021.09, 18,015.93 and 8,700.51

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Solution

The fourth proportional to 12,021.09, 18,015.93 and 8,700.51 is: 13,039.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,021.09 : 18,015.93 = 8,700.51 : x
  2. Step 2: Convert to fraction form
    12,021.09/18,015.93 = 8,700.51/x
  3. Step 3: Cross multiply
    12,021.09x = 18,015.93 × 8,700.51
  4. Step 4: Simplify right side
    12,021.09x = 156,747,779.12
  5. Step 5: Solve for x
    x = 156,747,779.12/12,021.09
  6. Step 6: Final answer
    x = 13,039.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.