Home / 21,268.86-29,349.77-12,315.72

Finding the Fourth Proportional to 21,268.86, 29,349.77 and 12,315.72

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Solution

The fourth proportional to 21,268.86, 29,349.77 and 12,315.72 is: 16,994.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.86 : 29,349.77 = 12,315.72 : x
  2. Step 2: Convert to fraction form
    21,268.86/29,349.77 = 12,315.72/x
  3. Step 3: Cross multiply
    21,268.86x = 29,349.77 × 12,315.72
  4. Step 4: Simplify right side
    21,268.86x = 361,463,549.38
  5. Step 5: Solve for x
    x = 361,463,549.38/21,268.86
  6. Step 6: Final answer
    x = 16,994.97

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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.