Home / 21,156.93-31,749.75-11,303.28

Finding the Fourth Proportional to 21,156.93, 31,749.75 and 11,303.28

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Solution

The fourth proportional to 21,156.93, 31,749.75 and 11,303.28 is: 16,962.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.93 : 31,749.75 = 11,303.28 : x
  2. Step 2: Convert to fraction form
    21,156.93/31,749.75 = 11,303.28/x
  3. Step 3: Cross multiply
    21,156.93x = 31,749.75 × 11,303.28
  4. Step 4: Simplify right side
    21,156.93x = 358,876,314.18
  5. Step 5: Solve for x
    x = 358,876,314.18/21,156.93
  6. Step 6: Final answer
    x = 16,962.59

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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.