Home / 15,318.18-21,138.54-9,359.82

Finding the Fourth Proportional to 15,318.18, 21,138.54 and 9,359.82

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Solution

The fourth proportional to 15,318.18, 21,138.54 and 9,359.82 is: 12,916.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,318.18 : 21,138.54 = 9,359.82 : x
  2. Step 2: Convert to fraction form
    15,318.18/21,138.54 = 9,359.82/x
  3. Step 3: Cross multiply
    15,318.18x = 21,138.54 × 9,359.82
  4. Step 4: Simplify right side
    15,318.18x = 197,852,929.46
  5. Step 5: Solve for x
    x = 197,852,929.46/15,318.18
  6. Step 6: Final answer
    x = 12,916.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.