Home / 11,221.84-15,485.04-6,506.40

Finding the Fourth Proportional to 11,221.84, 15,485.04 and 6,506.40

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Solution

The fourth proportional to 11,221.84, 15,485.04 and 6,506.40 is: 8,978.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,221.84 : 15,485.04 = 6,506.40 : x
  2. Step 2: Convert to fraction form
    11,221.84/15,485.04 = 6,506.40/x
  3. Step 3: Cross multiply
    11,221.84x = 15,485.04 × 6,506.40
  4. Step 4: Simplify right side
    11,221.84x = 100,751,864.26
  5. Step 5: Solve for x
    x = 100,751,864.26/11,221.84
  6. Step 6: Final answer
    x = 8,978.19

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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.