Home / 21,400.40-29,531.40-13,440.08

Finding the Fourth Proportional to 21,400.40, 29,531.40 and 13,440.08

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Solution

The fourth proportional to 21,400.40, 29,531.40 and 13,440.08 is: 18,546.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,400.40 : 29,531.40 = 13,440.08 : x
  2. Step 2: Convert to fraction form
    21,400.40/29,531.40 = 13,440.08/x
  3. Step 3: Cross multiply
    21,400.40x = 29,531.40 × 13,440.08
  4. Step 4: Simplify right side
    21,400.40x = 396,904,378.51
  5. Step 5: Solve for x
    x = 396,904,378.51/21,400.40
  6. Step 6: Final answer
    x = 18,546.59

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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.