Home / 21,455.22-29,601.24-13,907.40

Finding the Fourth Proportional to 21,455.22, 29,601.24 and 13,907.40

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Solution

The fourth proportional to 21,455.22, 29,601.24 and 13,907.40 is: 19,187.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,455.22 : 29,601.24 = 13,907.40 : x
  2. Step 2: Convert to fraction form
    21,455.22/29,601.24 = 13,907.40/x
  3. Step 3: Cross multiply
    21,455.22x = 29,601.24 × 13,907.40
  4. Step 4: Simplify right side
    21,455.22x = 411,676,285.18
  5. Step 5: Solve for x
    x = 411,676,285.18/21,455.22
  6. Step 6: Final answer
    x = 19,187.70

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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.