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Finding the Fourth Proportional to 18,630.55, 25,713.81 and 10,678.10

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Solution

The fourth proportional to 18,630.55, 25,713.81 and 10,678.10 is: 14,737.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,630.55 : 25,713.81 = 10,678.10 : x
  2. Step 2: Convert to fraction form
    18,630.55/25,713.81 = 10,678.10/x
  3. Step 3: Cross multiply
    18,630.55x = 25,713.81 × 10,678.10
  4. Step 4: Simplify right side
    18,630.55x = 274,574,581.17
  5. Step 5: Solve for x
    x = 274,574,581.17/18,630.55
  6. Step 6: Final answer
    x = 14,737.87

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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.