Home / 21,117.36-31,661.28-9,265.44

Finding the Fourth Proportional to 21,117.36, 31,661.28 and 9,265.44

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Solution

The fourth proportional to 21,117.36, 31,661.28 and 9,265.44 is: 13,891.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.36 : 31,661.28 = 9,265.44 : x
  2. Step 2: Convert to fraction form
    21,117.36/31,661.28 = 9,265.44/x
  3. Step 3: Cross multiply
    21,117.36x = 31,661.28 × 9,265.44
  4. Step 4: Simplify right side
    21,117.36x = 293,355,690.16
  5. Step 5: Solve for x
    x = 293,355,690.16/21,117.36
  6. Step 6: Final answer
    x = 13,891.68

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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.