Home / 21,340.31-29,449.70-12,388.19

Finding the Fourth Proportional to 21,340.31, 29,449.70 and 12,388.19

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Solution

The fourth proportional to 21,340.31, 29,449.70 and 12,388.19 is: 17,095.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.31 : 29,449.70 = 12,388.19 : x
  2. Step 2: Convert to fraction form
    21,340.31/29,449.70 = 12,388.19/x
  3. Step 3: Cross multiply
    21,340.31x = 29,449.70 × 12,388.19
  4. Step 4: Simplify right side
    21,340.31x = 364,828,516.81
  5. Step 5: Solve for x
    x = 364,828,516.81/21,340.31
  6. Step 6: Final answer
    x = 17,095.75

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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.