Home / 21,330.12-29,435.10-12,378.42

Finding the Fourth Proportional to 21,330.12, 29,435.10 and 12,378.42

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Solution

The fourth proportional to 21,330.12, 29,435.10 and 12,378.42 is: 17,081.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.12 : 29,435.10 = 12,378.42 : x
  2. Step 2: Convert to fraction form
    21,330.12/29,435.10 = 12,378.42/x
  3. Step 3: Cross multiply
    21,330.12x = 29,435.10 × 12,378.42
  4. Step 4: Simplify right side
    21,330.12x = 364,360,030.54
  5. Step 5: Solve for x
    x = 364,360,030.54/21,330.12
  6. Step 6: Final answer
    x = 17,081.95

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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.