Home / 20,813.76-31,237.02-9,714.78

Finding the Fourth Proportional to 20,813.76, 31,237.02 and 9,714.78

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Solution

The fourth proportional to 20,813.76, 31,237.02 and 9,714.78 is: 14,579.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.76 : 31,237.02 = 9,714.78 : x
  2. Step 2: Convert to fraction form
    20,813.76/31,237.02 = 9,714.78/x
  3. Step 3: Cross multiply
    20,813.76x = 31,237.02 × 9,714.78
  4. Step 4: Simplify right side
    20,813.76x = 303,460,777.16
  5. Step 5: Solve for x
    x = 303,460,777.16/20,813.76
  6. Step 6: Final answer
    x = 14,579.82

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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.