Home / 9,905.49-13,670.05-5,429.43

Finding the Fourth Proportional to 9,905.49, 13,670.05 and 5,429.43

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Solution

The fourth proportional to 9,905.49, 13,670.05 and 5,429.43 is: 7,492.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,905.49 : 13,670.05 = 5,429.43 : x
  2. Step 2: Convert to fraction form
    9,905.49/13,670.05 = 5,429.43/x
  3. Step 3: Cross multiply
    9,905.49x = 13,670.05 × 5,429.43
  4. Step 4: Simplify right side
    9,905.49x = 74,220,511.22
  5. Step 5: Solve for x
    x = 74,220,511.22/9,905.49
  6. Step 6: Final answer
    x = 7,492.87

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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.