Home / 19,427.60-29,141.40-12,429.20

Finding the Fourth Proportional to 19,427.60, 29,141.40 and 12,429.20

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Solution

The fourth proportional to 19,427.60, 29,141.40 and 12,429.20 is: 18,643.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,427.60 : 29,141.40 = 12,429.20 : x
  2. Step 2: Convert to fraction form
    19,427.60/29,141.40 = 12,429.20/x
  3. Step 3: Cross multiply
    19,427.60x = 29,141.40 × 12,429.20
  4. Step 4: Simplify right side
    19,427.60x = 362,204,288.88
  5. Step 5: Solve for x
    x = 362,204,288.88/19,427.60
  6. Step 6: Final answer
    x = 18,643.80

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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.