Home / 21,123.96-31,690.08-6,331.76

Finding the Fourth Proportional to 21,123.96, 31,690.08 and 6,331.76

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Solution

The fourth proportional to 21,123.96, 31,690.08 and 6,331.76 is: 9,498.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123.96 : 31,690.08 = 6,331.76 : x
  2. Step 2: Convert to fraction form
    21,123.96/31,690.08 = 6,331.76/x
  3. Step 3: Cross multiply
    21,123.96x = 31,690.08 × 6,331.76
  4. Step 4: Simplify right side
    21,123.96x = 200,653,980.94
  5. Step 5: Solve for x
    x = 200,653,980.94/21,123.96
  6. Step 6: Final answer
    x = 9,498.88

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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.