Home / 15,541.04-21,431.40-12,178.64

Finding the Fourth Proportional to 15,541.04, 21,431.40 and 12,178.64

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Solution

The fourth proportional to 15,541.04, 21,431.40 and 12,178.64 is: 16,794.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,541.04 : 21,431.40 = 12,178.64 : x
  2. Step 2: Convert to fraction form
    15,541.04/21,431.40 = 12,178.64/x
  3. Step 3: Cross multiply
    15,541.04x = 21,431.40 × 12,178.64
  4. Step 4: Simplify right side
    15,541.04x = 261,005,305.30
  5. Step 5: Solve for x
    x = 261,005,305.30/15,541.04
  6. Step 6: Final answer
    x = 16,794.58

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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.