Home / 12,180.24-18,271.80-7,801.20

Finding the Fourth Proportional to 12,180.24, 18,271.80 and 7,801.20

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Solution

The fourth proportional to 12,180.24, 18,271.80 and 7,801.20 is: 11,702.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,180.24 : 18,271.80 = 7,801.20 : x
  2. Step 2: Convert to fraction form
    12,180.24/18,271.80 = 7,801.20/x
  3. Step 3: Cross multiply
    12,180.24x = 18,271.80 × 7,801.20
  4. Step 4: Simplify right side
    12,180.24x = 142,541,966.16
  5. Step 5: Solve for x
    x = 142,541,966.16/12,180.24
  6. Step 6: Final answer
    x = 11,702.72

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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.