Home / 21,073.17-31,618.26-9,378.39

Finding the Fourth Proportional to 21,073.17, 31,618.26 and 9,378.39

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Solution

The fourth proportional to 21,073.17, 31,618.26 and 9,378.39 is: 14,071.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,073.17 : 31,618.26 = 9,378.39 : x
  2. Step 2: Convert to fraction form
    21,073.17/31,618.26 = 9,378.39/x
  3. Step 3: Cross multiply
    21,073.17x = 31,618.26 × 9,378.39
  4. Step 4: Simplify right side
    21,073.17x = 296,528,373.40
  5. Step 5: Solve for x
    x = 296,528,373.40/21,073.17
  6. Step 6: Final answer
    x = 14,071.37

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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.