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Finding the Fourth Proportional to 15,045.56, 20,762.82 and 8,421.56

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Solution

The fourth proportional to 15,045.56, 20,762.82 and 8,421.56 is: 11,621.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,045.56 : 20,762.82 = 8,421.56 : x
  2. Step 2: Convert to fraction form
    15,045.56/20,762.82 = 8,421.56/x
  3. Step 3: Cross multiply
    15,045.56x = 20,762.82 × 8,421.56
  4. Step 4: Simplify right side
    15,045.56x = 174,855,334.40
  5. Step 5: Solve for x
    x = 174,855,334.40/15,045.56
  6. Step 6: Final answer
    x = 11,621.72

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.