Home / 15,453.47-21,325.70-8,379.90

Finding the Fourth Proportional to 15,453.47, 21,325.70 and 8,379.90

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Solution

The fourth proportional to 15,453.47, 21,325.70 and 8,379.90 is: 11,564.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,453.47 : 21,325.70 = 8,379.90 : x
  2. Step 2: Convert to fraction form
    15,453.47/21,325.70 = 8,379.90/x
  3. Step 3: Cross multiply
    15,453.47x = 21,325.70 × 8,379.90
  4. Step 4: Simplify right side
    15,453.47x = 178,707,254.38
  5. Step 5: Solve for x
    x = 178,707,254.38/15,453.47
  6. Step 6: Final answer
    x = 11,564.21

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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.