Home / 21,105.11-31,665.26-9,870.48

Finding the Fourth Proportional to 21,105.11, 31,665.26 and 9,870.48

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Solution

The fourth proportional to 21,105.11, 31,665.26 and 9,870.48 is: 14,809.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.11 : 31,665.26 = 9,870.48 : x
  2. Step 2: Convert to fraction form
    21,105.11/31,665.26 = 9,870.48/x
  3. Step 3: Cross multiply
    21,105.11x = 31,665.26 × 9,870.48
  4. Step 4: Simplify right side
    21,105.11x = 312,551,340.20
  5. Step 5: Solve for x
    x = 312,551,340.20/21,105.11
  6. Step 6: Final answer
    x = 14,809.27

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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.