Home / 21,190.56-31,780.50-8,714.06

Finding the Fourth Proportional to 21,190.56, 31,780.50 and 8,714.06

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Solution

The fourth proportional to 21,190.56, 31,780.50 and 8,714.06 is: 13,068.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.56 : 31,780.50 = 8,714.06 : x
  2. Step 2: Convert to fraction form
    21,190.56/31,780.50 = 8,714.06/x
  3. Step 3: Cross multiply
    21,190.56x = 31,780.50 × 8,714.06
  4. Step 4: Simplify right side
    21,190.56x = 276,937,183.83
  5. Step 5: Solve for x
    x = 276,937,183.83/21,190.56
  6. Step 6: Final answer
    x = 13,068.89

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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.