Home / 21,333.15-29,442.42-12,378.74

Finding the Fourth Proportional to 21,333.15, 29,442.42 and 12,378.74

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Solution

The fourth proportional to 21,333.15, 29,442.42 and 12,378.74 is: 17,084.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,333.15 : 29,442.42 = 12,378.74 : x
  2. Step 2: Convert to fraction form
    21,333.15/29,442.42 = 12,378.74/x
  3. Step 3: Cross multiply
    21,333.15x = 29,442.42 × 12,378.74
  4. Step 4: Simplify right side
    21,333.15x = 364,459,914.94
  5. Step 5: Solve for x
    x = 364,459,914.94/21,333.15
  6. Step 6: Final answer
    x = 17,084.21

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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.