Home / 12,381.40-18,574.80-3,615.58

Finding the Fourth Proportional to 12,381.40, 18,574.80 and 3,615.58

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Solution

The fourth proportional to 12,381.40, 18,574.80 and 3,615.58 is: 5,424.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,381.40 : 18,574.80 = 3,615.58 : x
  2. Step 2: Convert to fraction form
    12,381.40/18,574.80 = 3,615.58/x
  3. Step 3: Cross multiply
    12,381.40x = 18,574.80 × 3,615.58
  4. Step 4: Simplify right side
    12,381.40x = 67,158,675.38
  5. Step 5: Solve for x
    x = 67,158,675.38/12,381.40
  6. Step 6: Final answer
    x = 5,424.16

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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.