Home / 19,880.72-29,825.96-9,890.18

Finding the Fourth Proportional to 19,880.72, 29,825.96 and 9,890.18

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Solution

The fourth proportional to 19,880.72, 29,825.96 and 9,890.18 is: 14,837.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,880.72 : 29,825.96 = 9,890.18 : x
  2. Step 2: Convert to fraction form
    19,880.72/29,825.96 = 9,890.18/x
  3. Step 3: Cross multiply
    19,880.72x = 29,825.96 × 9,890.18
  4. Step 4: Simplify right side
    19,880.72x = 294,983,914.49
  5. Step 5: Solve for x
    x = 294,983,914.49/19,880.72
  6. Step 6: Final answer
    x = 14,837.69

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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.