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Finding the Fourth Proportional to 12,885.44, 17,779.52 and 7,581.28

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Solution

The fourth proportional to 12,885.44, 17,779.52 and 7,581.28 is: 10,460.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,885.44 : 17,779.52 = 7,581.28 : x
  2. Step 2: Convert to fraction form
    12,885.44/17,779.52 = 7,581.28/x
  3. Step 3: Cross multiply
    12,885.44x = 17,779.52 × 7,581.28
  4. Step 4: Simplify right side
    12,885.44x = 134,791,519.39
  5. Step 5: Solve for x
    x = 134,791,519.39/12,885.44
  6. Step 6: Final answer
    x = 10,460.76

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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.