Home / 20,810.13-31,223.06-12,495.94

Finding the Fourth Proportional to 20,810.13, 31,223.06 and 12,495.94

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Solution

The fourth proportional to 20,810.13, 31,223.06 and 12,495.94 is: 18,748.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.13 : 31,223.06 = 12,495.94 : x
  2. Step 2: Convert to fraction form
    20,810.13/31,223.06 = 12,495.94/x
  3. Step 3: Cross multiply
    20,810.13x = 31,223.06 × 12,495.94
  4. Step 4: Simplify right side
    20,810.13x = 390,161,484.38
  5. Step 5: Solve for x
    x = 390,161,484.38/20,810.13
  6. Step 6: Final answer
    x = 18,748.63

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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.