Home / 42,455.28-63,686.16-11,289.72

Finding the Fourth Proportional to 42,455.28, 63,686.16 and 11,289.72

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Solution

The fourth proportional to 42,455.28, 63,686.16 and 11,289.72 is: 16,935.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,455.28 : 63,686.16 = 11,289.72 : x
  2. Step 2: Convert to fraction form
    42,455.28/63,686.16 = 11,289.72/x
  3. Step 3: Cross multiply
    42,455.28x = 63,686.16 × 11,289.72
  4. Step 4: Simplify right side
    42,455.28x = 718,998,914.28
  5. Step 5: Solve for x
    x = 718,998,914.28/42,455.28
  6. Step 6: Final answer
    x = 16,935.44

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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.