Home / 21,438.84-32,159.73-6,645.81

Finding the Fourth Proportional to 21,438.84, 32,159.73 and 6,645.81

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Solution

The fourth proportional to 21,438.84, 32,159.73 and 6,645.81 is: 9,969.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.84 : 32,159.73 = 6,645.81 : x
  2. Step 2: Convert to fraction form
    21,438.84/32,159.73 = 6,645.81/x
  3. Step 3: Cross multiply
    21,438.84x = 32,159.73 × 6,645.81
  4. Step 4: Simplify right side
    21,438.84x = 213,727,455.23
  5. Step 5: Solve for x
    x = 213,727,455.23/21,438.84
  6. Step 6: Final answer
    x = 9,969.17

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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.