Home / 21,342.08-29,451.60-12,389.36

Finding the Fourth Proportional to 21,342.08, 29,451.60 and 12,389.36

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Solution

The fourth proportional to 21,342.08, 29,451.60 and 12,389.36 is: 17,097.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,342.08 : 29,451.60 = 12,389.36 : x
  2. Step 2: Convert to fraction form
    21,342.08/29,451.60 = 12,389.36/x
  3. Step 3: Cross multiply
    21,342.08x = 29,451.60 × 12,389.36
  4. Step 4: Simplify right side
    21,342.08x = 364,886,327.72
  5. Step 5: Solve for x
    x = 364,886,327.72/21,342.08
  6. Step 6: Final answer
    x = 17,097.03

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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.