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Finding the Fourth Proportional to 18,746.28, 28,119.42 and 4,895.16

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Solution

The fourth proportional to 18,746.28, 28,119.42 and 4,895.16 is: 7,342.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,746.28 : 28,119.42 = 4,895.16 : x
  2. Step 2: Convert to fraction form
    18,746.28/28,119.42 = 4,895.16/x
  3. Step 3: Cross multiply
    18,746.28x = 28,119.42 × 4,895.16
  4. Step 4: Simplify right side
    18,746.28x = 137,649,060.01
  5. Step 5: Solve for x
    x = 137,649,060.01/18,746.28
  6. Step 6: Final answer
    x = 7,342.74

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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.