Home / 12,660.63-18,990.81-4,871.13

Finding the Fourth Proportional to 12,660.63, 18,990.81 and 4,871.13

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Solution

The fourth proportional to 12,660.63, 18,990.81 and 4,871.13 is: 7,306.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.63 : 18,990.81 = 4,871.13 : x
  2. Step 2: Convert to fraction form
    12,660.63/18,990.81 = 4,871.13/x
  3. Step 3: Cross multiply
    12,660.63x = 18,990.81 × 4,871.13
  4. Step 4: Simplify right side
    12,660.63x = 92,506,704.32
  5. Step 5: Solve for x
    x = 92,506,704.32/12,660.63
  6. Step 6: Final answer
    x = 7,306.64

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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.