Home / 21,011.00-28,995.20-11,450.90

Finding the Fourth Proportional to 21,011.00, 28,995.20 and 11,450.90

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Solution

The fourth proportional to 21,011.00, 28,995.20 and 11,450.90 is: 15,802.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.00 : 28,995.20 = 11,450.90 : x
  2. Step 2: Convert to fraction form
    21,011.00/28,995.20 = 11,450.90/x
  3. Step 3: Cross multiply
    21,011.00x = 28,995.20 × 11,450.90
  4. Step 4: Simplify right side
    21,011.00x = 332,020,933.45
  5. Step 5: Solve for x
    x = 332,020,933.45/21,011.00
  6. Step 6: Final answer
    x = 15,802.24

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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.