Home / 15,690.86-21,655.96-12,111.02

Finding the Fourth Proportional to 15,690.86, 21,655.96 and 12,111.02

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Solution

The fourth proportional to 15,690.86, 21,655.96 and 12,111.02 is: 16,715.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.86 : 21,655.96 = 12,111.02 : x
  2. Step 2: Convert to fraction form
    15,690.86/21,655.96 = 12,111.02/x
  3. Step 3: Cross multiply
    15,690.86x = 21,655.96 × 12,111.02
  4. Step 4: Simplify right side
    15,690.86x = 262,275,707.33
  5. Step 5: Solve for x
    x = 262,275,707.33/15,690.86
  6. Step 6: Final answer
    x = 16,715.19

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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.