Home / 21,339.18-29,447.46-12,387.42

Finding the Fourth Proportional to 21,339.18, 29,447.46 and 12,387.42

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Solution

The fourth proportional to 21,339.18, 29,447.46 and 12,387.42 is: 17,094.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,339.18 : 29,447.46 = 12,387.42 : x
  2. Step 2: Convert to fraction form
    21,339.18/29,447.46 = 12,387.42/x
  3. Step 3: Cross multiply
    21,339.18x = 29,447.46 × 12,387.42
  4. Step 4: Simplify right side
    21,339.18x = 364,778,054.95
  5. Step 5: Solve for x
    x = 364,778,054.95/21,339.18
  6. Step 6: Final answer
    x = 17,094.29

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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.