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Finding the Fourth Proportional to 8,326.40, 12,428.86 and 7,275.45

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Solution

The fourth proportional to 8,326.40, 12,428.86 and 7,275.45 is: 10,860.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,326.40 : 12,428.86 = 7,275.45 : x
  2. Step 2: Convert to fraction form
    8,326.40/12,428.86 = 7,275.45/x
  3. Step 3: Cross multiply
    8,326.40x = 12,428.86 × 7,275.45
  4. Step 4: Simplify right side
    8,326.40x = 90,425,486.68
  5. Step 5: Solve for x
    x = 90,425,486.68/8,326.40
  6. Step 6: Final answer
    x = 10,860.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.