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Finding the Fourth Proportional to 28,329.55, 42,501.31 and 8,607.06

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Solution

The fourth proportional to 28,329.55, 42,501.31 and 8,607.06 is: 12,912.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,329.55 : 42,501.31 = 8,607.06 : x
  2. Step 2: Convert to fraction form
    28,329.55/42,501.31 = 8,607.06/x
  3. Step 3: Cross multiply
    28,329.55x = 42,501.31 × 8,607.06
  4. Step 4: Simplify right side
    28,329.55x = 365,811,303.73
  5. Step 5: Solve for x
    x = 365,811,303.73/28,329.55
  6. Step 6: Final answer
    x = 12,912.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.