Home / 9,315.30-12,855.05-5,282.89

Finding the Fourth Proportional to 9,315.30, 12,855.05 and 5,282.89

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Solution

The fourth proportional to 9,315.30, 12,855.05 and 5,282.89 is: 7,290.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,315.30 : 12,855.05 = 5,282.89 : x
  2. Step 2: Convert to fraction form
    9,315.30/12,855.05 = 5,282.89/x
  3. Step 3: Cross multiply
    9,315.30x = 12,855.05 × 5,282.89
  4. Step 4: Simplify right side
    9,315.30x = 67,911,769.75
  5. Step 5: Solve for x
    x = 67,911,769.75/9,315.30
  6. Step 6: Final answer
    x = 7,290.35

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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.