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Finding the Fourth Proportional to 12,478.68, 18,718.02 and 3,713.58

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Solution

The fourth proportional to 12,478.68, 18,718.02 and 3,713.58 is: 5,570.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.68 : 18,718.02 = 3,713.58 : x
  2. Step 2: Convert to fraction form
    12,478.68/18,718.02 = 3,713.58/x
  3. Step 3: Cross multiply
    12,478.68x = 18,718.02 × 3,713.58
  4. Step 4: Simplify right side
    12,478.68x = 69,510,864.71
  5. Step 5: Solve for x
    x = 69,510,864.71/12,478.68
  6. Step 6: Final answer
    x = 5,570.37

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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.