Home / 21,309.53-31,963.14-6,518.45

Finding the Fourth Proportional to 21,309.53, 31,963.14 and 6,518.45

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Solution

The fourth proportional to 21,309.53, 31,963.14 and 6,518.45 is: 9,777.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.53 : 31,963.14 = 6,518.45 : x
  2. Step 2: Convert to fraction form
    21,309.53/31,963.14 = 6,518.45/x
  3. Step 3: Cross multiply
    21,309.53x = 31,963.14 × 6,518.45
  4. Step 4: Simplify right side
    21,309.53x = 208,349,970.12
  5. Step 5: Solve for x
    x = 208,349,970.12/21,309.53
  6. Step 6: Final answer
    x = 9,777.32

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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.