Home / 21,345.64-29,454.18-11,912.68

Finding the Fourth Proportional to 21,345.64, 29,454.18 and 11,912.68

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Solution

The fourth proportional to 21,345.64, 29,454.18 and 11,912.68 is: 16,437.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,345.64 : 29,454.18 = 11,912.68 : x
  2. Step 2: Convert to fraction form
    21,345.64/29,454.18 = 11,912.68/x
  3. Step 3: Cross multiply
    21,345.64x = 29,454.18 × 11,912.68
  4. Step 4: Simplify right side
    21,345.64x = 350,878,221.00
  5. Step 5: Solve for x
    x = 350,878,221.00/21,345.64
  6. Step 6: Final answer
    x = 16,437.93

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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.