Home / 9,916.40-14,868.12-4,978.64

Finding the Fourth Proportional to 9,916.40, 14,868.12 and 4,978.64

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Solution

The fourth proportional to 9,916.40, 14,868.12 and 4,978.64 is: 7,464.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,916.40 : 14,868.12 = 4,978.64 : x
  2. Step 2: Convert to fraction form
    9,916.40/14,868.12 = 4,978.64/x
  3. Step 3: Cross multiply
    9,916.40x = 14,868.12 × 4,978.64
  4. Step 4: Simplify right side
    9,916.40x = 74,023,016.96
  5. Step 5: Solve for x
    x = 74,023,016.96/9,916.40
  6. Step 6: Final answer
    x = 7,464.71

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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.