Home / 21,858.40-32,799.12-12,630.88

Finding the Fourth Proportional to 21,858.40, 32,799.12 and 12,630.88

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Solution

The fourth proportional to 21,858.40, 32,799.12 and 12,630.88 is: 18,952.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.40 : 32,799.12 = 12,630.88 : x
  2. Step 2: Convert to fraction form
    21,858.40/32,799.12 = 12,630.88/x
  3. Step 3: Cross multiply
    21,858.40x = 32,799.12 × 12,630.88
  4. Step 4: Simplify right side
    21,858.40x = 414,281,748.83
  5. Step 5: Solve for x
    x = 414,281,748.83/21,858.40
  6. Step 6: Final answer
    x = 18,952.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.