Home / 42,749.40-64,127.75-11,163.66

Finding the Fourth Proportional to 42,749.40, 64,127.75 and 11,163.66

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Solution

The fourth proportional to 42,749.40, 64,127.75 and 11,163.66 is: 16,746.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,749.40 : 64,127.75 = 11,163.66 : x
  2. Step 2: Convert to fraction form
    42,749.40/64,127.75 = 11,163.66/x
  3. Step 3: Cross multiply
    42,749.40x = 64,127.75 × 11,163.66
  4. Step 4: Simplify right side
    42,749.40x = 715,900,341.75
  5. Step 5: Solve for x
    x = 715,900,341.75/42,749.40
  6. Step 6: Final answer
    x = 16,746.44

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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.