Home / 9,355.72-12,910.80-5,378.08

Finding the Fourth Proportional to 9,355.72, 12,910.80 and 5,378.08

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Solution

The fourth proportional to 9,355.72, 12,910.80 and 5,378.08 is: 7,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,355.72 : 12,910.80 = 5,378.08 : x
  2. Step 2: Convert to fraction form
    9,355.72/12,910.80 = 5,378.08/x
  3. Step 3: Cross multiply
    9,355.72x = 12,910.80 × 5,378.08
  4. Step 4: Simplify right side
    9,355.72x = 69,435,315.26
  5. Step 5: Solve for x
    x = 69,435,315.26/9,355.72
  6. Step 6: Final answer
    x = 7,421.70

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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.