Home / 9,429.12-13,011.84-6,638.40

Finding the Fourth Proportional to 9,429.12, 13,011.84 and 6,638.40

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Solution

The fourth proportional to 9,429.12, 13,011.84 and 6,638.40 is: 9,160.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,429.12 : 13,011.84 = 6,638.40 : x
  2. Step 2: Convert to fraction form
    9,429.12/13,011.84 = 6,638.40/x
  3. Step 3: Cross multiply
    9,429.12x = 13,011.84 × 6,638.40
  4. Step 4: Simplify right side
    9,429.12x = 86,377,798.66
  5. Step 5: Solve for x
    x = 86,377,798.66/9,429.12
  6. Step 6: Final answer
    x = 9,160.75

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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.