Home / 9,287.40-12,815.70-5,307.68

Finding the Fourth Proportional to 9,287.40, 12,815.70 and 5,307.68

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Solution

The fourth proportional to 9,287.40, 12,815.70 and 5,307.68 is: 7,324.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,287.40 : 12,815.70 = 5,307.68 : x
  2. Step 2: Convert to fraction form
    9,287.40/12,815.70 = 5,307.68/x
  3. Step 3: Cross multiply
    9,287.40x = 12,815.70 × 5,307.68
  4. Step 4: Simplify right side
    9,287.40x = 68,021,634.58
  5. Step 5: Solve for x
    x = 68,021,634.58/9,287.40
  6. Step 6: Final answer
    x = 7,324.08

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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.