Home / 18,918.08-26,107-10,420

Finding the Fourth Proportional to 18,918.08, 26,107 and 10,420

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Solution

The fourth proportional to 18,918.08, 26,107 and 10,420 is: 14,379.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.08 : 26,107 = 10,420 : x
  2. Step 2: Convert to fraction form
    18,918.08/26,107 = 10,420/x
  3. Step 3: Cross multiply
    18,918.08x = 26,107 × 10,420
  4. Step 4: Simplify right side
    18,918.08x = 272,034,940
  5. Step 5: Solve for x
    x = 272,034,940/18,918.08
  6. Step 6: Final answer
    x = 14,379.63

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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.