Home / 20,819.04-31,237.20-12,516

Finding the Fourth Proportional to 20,819.04, 31,237.20 and 12,516

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Solution

The fourth proportional to 20,819.04, 31,237.20 and 12,516 is: 18,779.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.04 : 31,237.20 = 12,516 : x
  2. Step 2: Convert to fraction form
    20,819.04/31,237.20 = 12,516/x
  3. Step 3: Cross multiply
    20,819.04x = 31,237.20 × 12,516
  4. Step 4: Simplify right side
    20,819.04x = 390,964,795.20
  5. Step 5: Solve for x
    x = 390,964,795.20/20,819.04
  6. Step 6: Final answer
    x = 18,779.19

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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.