Home / 21,345.58-29,458.86-11,787.18

Finding the Fourth Proportional to 21,345.58, 29,458.86 and 11,787.18

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Solution

The fourth proportional to 21,345.58, 29,458.86 and 11,787.18 is: 16,267.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,345.58 : 29,458.86 = 11,787.18 : x
  2. Step 2: Convert to fraction form
    21,345.58/29,458.86 = 11,787.18/x
  3. Step 3: Cross multiply
    21,345.58x = 29,458.86 × 11,787.18
  4. Step 4: Simplify right side
    21,345.58x = 347,236,885.41
  5. Step 5: Solve for x
    x = 347,236,885.41/21,345.58
  6. Step 6: Final answer
    x = 16,267.39

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Double scale
Find fourth proportional to 21,346.58, 29,460.24 and 11,788.18
Similar ratio
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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.