Home / 21,583.12-29,782.56-15,920.93

Finding the Fourth Proportional to 21,583.12, 29,782.56 and 15,920.93

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Solution

The fourth proportional to 21,583.12, 29,782.56 and 15,920.93 is: 21,969.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,583.12 : 29,782.56 = 15,920.93 : x
  2. Step 2: Convert to fraction form
    21,583.12/29,782.56 = 15,920.93/x
  3. Step 3: Cross multiply
    21,583.12x = 29,782.56 × 15,920.93
  4. Step 4: Simplify right side
    21,583.12x = 474,166,052.98
  5. Step 5: Solve for x
    x = 474,166,052.98/21,583.12
  6. Step 6: Final answer
    x = 21,969.30

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Double scale
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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.