Home / 8,521.20-12,782.40-4,825.20

Finding the Fourth Proportional to 8,521.20, 12,782.40 and 4,825.20

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Solution

The fourth proportional to 8,521.20, 12,782.40 and 4,825.20 is: 7,238.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,521.20 : 12,782.40 = 4,825.20 : x
  2. Step 2: Convert to fraction form
    8,521.20/12,782.40 = 4,825.20/x
  3. Step 3: Cross multiply
    8,521.20x = 12,782.40 × 4,825.20
  4. Step 4: Simplify right side
    8,521.20x = 61,677,636.48
  5. Step 5: Solve for x
    x = 61,677,636.48/8,521.20
  6. Step 6: Final answer
    x = 7,238.14

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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.