Home / 21,531.60-29,727.35-13,878.32

Finding the Fourth Proportional to 21,531.60, 29,727.35 and 13,878.32

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Solution

The fourth proportional to 21,531.60, 29,727.35 and 13,878.32 is: 19,160.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.60 : 29,727.35 = 13,878.32 : x
  2. Step 2: Convert to fraction form
    21,531.60/29,727.35 = 13,878.32/x
  3. Step 3: Cross multiply
    21,531.60x = 29,727.35 × 13,878.32
  4. Step 4: Simplify right side
    21,531.60x = 412,565,458.02
  5. Step 5: Solve for x
    x = 412,565,458.02/21,531.60
  6. Step 6: Final answer
    x = 19,160.93

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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.