Home / 10,342.72-15,511.20-7,412.32

Finding the Fourth Proportional to 10,342.72, 15,511.20 and 7,412.32

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Solution

The fourth proportional to 10,342.72, 15,511.20 and 7,412.32 is: 11,116.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,342.72 : 15,511.20 = 7,412.32 : x
  2. Step 2: Convert to fraction form
    10,342.72/15,511.20 = 7,412.32/x
  3. Step 3: Cross multiply
    10,342.72x = 15,511.20 × 7,412.32
  4. Step 4: Simplify right side
    10,342.72x = 114,973,977.98
  5. Step 5: Solve for x
    x = 114,973,977.98/10,342.72
  6. Step 6: Final answer
    x = 11,116.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.