Home / 8,939.84-12,338.08-5,215.04

Finding the Fourth Proportional to 8,939.84, 12,338.08 and 5,215.04

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Solution

The fourth proportional to 8,939.84, 12,338.08 and 5,215.04 is: 7,197.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.84 : 12,338.08 = 5,215.04 : x
  2. Step 2: Convert to fraction form
    8,939.84/12,338.08 = 5,215.04/x
  3. Step 3: Cross multiply
    8,939.84x = 12,338.08 × 5,215.04
  4. Step 4: Simplify right side
    8,939.84x = 64,343,580.72
  5. Step 5: Solve for x
    x = 64,343,580.72/8,939.84
  6. Step 6: Final answer
    x = 7,197.40

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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.