Home / 20,730.30-31,095.45-15,809.55

Finding the Fourth Proportional to 20,730.30, 31,095.45 and 15,809.55

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Solution

The fourth proportional to 20,730.30, 31,095.45 and 15,809.55 is: 23,714.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.30 : 31,095.45 = 15,809.55 : x
  2. Step 2: Convert to fraction form
    20,730.30/31,095.45 = 15,809.55/x
  3. Step 3: Cross multiply
    20,730.30x = 31,095.45 × 15,809.55
  4. Step 4: Simplify right side
    20,730.30x = 491,605,071.55
  5. Step 5: Solve for x
    x = 491,605,071.55/20,730.30
  6. Step 6: Final answer
    x = 23,714.33

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1.5x scale

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.