Home / 20,956.50-28,913.49-13,886.82

Finding the Fourth Proportional to 20,956.50, 28,913.49 and 13,886.82

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Solution

The fourth proportional to 20,956.50, 28,913.49 and 13,886.82 is: 19,159.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.50 : 28,913.49 = 13,886.82 : x
  2. Step 2: Convert to fraction form
    20,956.50/28,913.49 = 13,886.82/x
  3. Step 3: Cross multiply
    20,956.50x = 28,913.49 × 13,886.82
  4. Step 4: Simplify right side
    20,956.50x = 401,516,431.20
  5. Step 5: Solve for x
    x = 401,516,431.20/20,956.50
  6. Step 6: Final answer
    x = 19,159.52

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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.