Home / 11,821.16-16,295.30-9,721.64

Finding the Fourth Proportional to 11,821.16, 16,295.30 and 9,721.64

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Solution

The fourth proportional to 11,821.16, 16,295.30 and 9,721.64 is: 13,401.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,821.16 : 16,295.30 = 9,721.64 : x
  2. Step 2: Convert to fraction form
    11,821.16/16,295.30 = 9,721.64/x
  3. Step 3: Cross multiply
    11,821.16x = 16,295.30 × 9,721.64
  4. Step 4: Simplify right side
    11,821.16x = 158,417,040.29
  5. Step 5: Solve for x
    x = 158,417,040.29/11,821.16
  6. Step 6: Final answer
    x = 13,401.14

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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.