Home / 12,985.64-19,482.30-4,221.80

Finding the Fourth Proportional to 12,985.64, 19,482.30 and 4,221.80

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Solution

The fourth proportional to 12,985.64, 19,482.30 and 4,221.80 is: 6,333.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.64 : 19,482.30 = 4,221.80 : x
  2. Step 2: Convert to fraction form
    12,985.64/19,482.30 = 4,221.80/x
  3. Step 3: Cross multiply
    12,985.64x = 19,482.30 × 4,221.80
  4. Step 4: Simplify right side
    12,985.64x = 82,250,374.14
  5. Step 5: Solve for x
    x = 82,250,374.14/12,985.64
  6. Step 6: Final answer
    x = 6,333.95

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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.