Home / 21,011.46-28,993.16-14,220.32

Finding the Fourth Proportional to 21,011.46, 28,993.16 and 14,220.32

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Solution

The fourth proportional to 21,011.46, 28,993.16 and 14,220.32 is: 19,622.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.46 : 28,993.16 = 14,220.32 : x
  2. Step 2: Convert to fraction form
    21,011.46/28,993.16 = 14,220.32/x
  3. Step 3: Cross multiply
    21,011.46x = 28,993.16 × 14,220.32
  4. Step 4: Simplify right side
    21,011.46x = 412,292,013.01
  5. Step 5: Solve for x
    x = 412,292,013.01/21,011.46
  6. Step 6: Final answer
    x = 19,622.24

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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.