Home / 12,521.40-18,782.10-11,500.80

Finding the Fourth Proportional to 12,521.40, 18,782.10 and 11,500.80

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Solution

The fourth proportional to 12,521.40, 18,782.10 and 11,500.80 is: 17,251.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,521.40 : 18,782.10 = 11,500.80 : x
  2. Step 2: Convert to fraction form
    12,521.40/18,782.10 = 11,500.80/x
  3. Step 3: Cross multiply
    12,521.40x = 18,782.10 × 11,500.80
  4. Step 4: Simplify right side
    12,521.40x = 216,009,175.68
  5. Step 5: Solve for x
    x = 216,009,175.68/12,521.40
  6. Step 6: Final answer
    x = 17,251.20

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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.