Home / 8,782.24-12,127.58-5,643.90

Finding the Fourth Proportional to 8,782.24, 12,127.58 and 5,643.90

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Solution

The fourth proportional to 8,782.24, 12,127.58 and 5,643.90 is: 7,793.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.24 : 12,127.58 = 5,643.90 : x
  2. Step 2: Convert to fraction form
    8,782.24/12,127.58 = 5,643.90/x
  3. Step 3: Cross multiply
    8,782.24x = 12,127.58 × 5,643.90
  4. Step 4: Simplify right side
    8,782.24x = 68,446,848.76
  5. Step 5: Solve for x
    x = 68,446,848.76/8,782.24
  6. Step 6: Final answer
    x = 7,793.78

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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.