Home / 8,922.55-12,312.79-5,145.88

Finding the Fourth Proportional to 8,922.55, 12,312.79 and 5,145.88

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Solution

The fourth proportional to 8,922.55, 12,312.79 and 5,145.88 is: 7,101.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,922.55 : 12,312.79 = 5,145.88 : x
  2. Step 2: Convert to fraction form
    8,922.55/12,312.79 = 5,145.88/x
  3. Step 3: Cross multiply
    8,922.55x = 12,312.79 × 5,145.88
  4. Step 4: Simplify right side
    8,922.55x = 63,360,078.24
  5. Step 5: Solve for x
    x = 63,360,078.24/8,922.55
  6. Step 6: Final answer
    x = 7,101.12

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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.