Home / 12,890.60-19,335.90-4,126.40

Finding the Fourth Proportional to 12,890.60, 19,335.90 and 4,126.40

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Solution

The fourth proportional to 12,890.60, 19,335.90 and 4,126.40 is: 6,189.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.60 : 19,335.90 = 4,126.40 : x
  2. Step 2: Convert to fraction form
    12,890.60/19,335.90 = 4,126.40/x
  3. Step 3: Cross multiply
    12,890.60x = 19,335.90 × 4,126.40
  4. Step 4: Simplify right side
    12,890.60x = 79,787,657.76
  5. Step 5: Solve for x
    x = 79,787,657.76/12,890.60
  6. Step 6: Final answer
    x = 6,189.60

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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.