Home / 11,421.52-15,761.64-6,639.76

Finding the Fourth Proportional to 11,421.52, 15,761.64 and 6,639.76

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Solution

The fourth proportional to 11,421.52, 15,761.64 and 6,639.76 is: 9,162.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.52 : 15,761.64 = 6,639.76 : x
  2. Step 2: Convert to fraction form
    11,421.52/15,761.64 = 6,639.76/x
  3. Step 3: Cross multiply
    11,421.52x = 15,761.64 × 6,639.76
  4. Step 4: Simplify right side
    11,421.52x = 104,653,506.81
  5. Step 5: Solve for x
    x = 104,653,506.81/11,421.52
  6. Step 6: Final answer
    x = 9,162.84

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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.