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Finding the Fourth Proportional to 18,753.12, 25,880.40 and 10,370.40

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Solution

The fourth proportional to 18,753.12, 25,880.40 and 10,370.40 is: 14,311.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.12 : 25,880.40 = 10,370.40 : x
  2. Step 2: Convert to fraction form
    18,753.12/25,880.40 = 10,370.40/x
  3. Step 3: Cross multiply
    18,753.12x = 25,880.40 × 10,370.40
  4. Step 4: Simplify right side
    18,753.12x = 268,390,100.16
  5. Step 5: Solve for x
    x = 268,390,100.16/18,753.12
  6. Step 6: Final answer
    x = 14,311.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.