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Finding the Fourth Proportional to 13,750.60, 20,601.60 and 12,875.80

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Solution

The fourth proportional to 13,750.60, 20,601.60 and 12,875.80 is: 19,290.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,750.60 : 20,601.60 = 12,875.80 : x
  2. Step 2: Convert to fraction form
    13,750.60/20,601.60 = 12,875.80/x
  3. Step 3: Cross multiply
    13,750.60x = 20,601.60 × 12,875.80
  4. Step 4: Simplify right side
    13,750.60x = 265,262,081.28
  5. Step 5: Solve for x
    x = 265,262,081.28/13,750.60
  6. Step 6: Final answer
    x = 19,290.95

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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.