Home / 20,664.64-31,036.80-17,709.76

Finding the Fourth Proportional to 20,664.64, 31,036.80 and 17,709.76

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Solution

The fourth proportional to 20,664.64, 31,036.80 and 17,709.76 is: 26,598.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.64 : 31,036.80 = 17,709.76 : x
  2. Step 2: Convert to fraction form
    20,664.64/31,036.80 = 17,709.76/x
  3. Step 3: Cross multiply
    20,664.64x = 31,036.80 × 17,709.76
  4. Step 4: Simplify right side
    20,664.64x = 549,654,279.17
  5. Step 5: Solve for x
    x = 549,654,279.17/20,664.64
  6. Step 6: Final answer
    x = 26,598.78

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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.