Home / 21,118.64-31,679.96-6,126.16

Finding the Fourth Proportional to 21,118.64, 31,679.96 and 6,126.16

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Solution

The fourth proportional to 21,118.64, 31,679.96 and 6,126.16 is: 9,189.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.64 : 31,679.96 = 6,126.16 : x
  2. Step 2: Convert to fraction form
    21,118.64/31,679.96 = 6,126.16/x
  3. Step 3: Cross multiply
    21,118.64x = 31,679.96 × 6,126.16
  4. Step 4: Simplify right side
    21,118.64x = 194,076,503.75
  5. Step 5: Solve for x
    x = 194,076,503.75/21,118.64
  6. Step 6: Final answer
    x = 9,189.82

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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.