Home / 28,137.60-42,206.40-12,585.60

Finding the Fourth Proportional to 28,137.60, 42,206.40 and 12,585.60

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Solution

The fourth proportional to 28,137.60, 42,206.40 and 12,585.60 is: 18,878.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.60 : 42,206.40 = 12,585.60 : x
  2. Step 2: Convert to fraction form
    28,137.60/42,206.40 = 12,585.60/x
  3. Step 3: Cross multiply
    28,137.60x = 42,206.40 × 12,585.60
  4. Step 4: Simplify right side
    28,137.60x = 531,192,867.84
  5. Step 5: Solve for x
    x = 531,192,867.84/28,137.60
  6. Step 6: Final answer
    x = 18,878.40

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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.