Home / 21,286.32-29,374.02-11,855.40

Finding the Fourth Proportional to 21,286.32, 29,374.02 and 11,855.40

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Solution

The fourth proportional to 21,286.32, 29,374.02 and 11,855.40 is: 16,359.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.32 : 29,374.02 = 11,855.40 : x
  2. Step 2: Convert to fraction form
    21,286.32/29,374.02 = 11,855.40/x
  3. Step 3: Cross multiply
    21,286.32x = 29,374.02 × 11,855.40
  4. Step 4: Simplify right side
    21,286.32x = 348,240,756.71
  5. Step 5: Solve for x
    x = 348,240,756.71/21,286.32
  6. Step 6: Final answer
    x = 16,359.84

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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.