Home / 19,431.60-29,169.30-12,870.60

Finding the Fourth Proportional to 19,431.60, 29,169.30 and 12,870.60

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Solution

The fourth proportional to 19,431.60, 29,169.30 and 12,870.60 is: 19,320.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,431.60 : 29,169.30 = 12,870.60 : x
  2. Step 2: Convert to fraction form
    19,431.60/29,169.30 = 12,870.60/x
  3. Step 3: Cross multiply
    19,431.60x = 29,169.30 × 12,870.60
  4. Step 4: Simplify right side
    19,431.60x = 375,426,392.58
  5. Step 5: Solve for x
    x = 375,426,392.58/19,431.60
  6. Step 6: Final answer
    x = 19,320.41

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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.