Home / 20,827.32-28,741.80-13,272.06

Finding the Fourth Proportional to 20,827.32, 28,741.80 and 13,272.06

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Solution

The fourth proportional to 20,827.32, 28,741.80 and 13,272.06 is: 18,315.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.32 : 28,741.80 = 13,272.06 : x
  2. Step 2: Convert to fraction form
    20,827.32/28,741.80 = 13,272.06/x
  3. Step 3: Cross multiply
    20,827.32x = 28,741.80 × 13,272.06
  4. Step 4: Simplify right side
    20,827.32x = 381,462,894.11
  5. Step 5: Solve for x
    x = 381,462,894.11/20,827.32
  6. Step 6: Final answer
    x = 18,315.51

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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.