Home / 21,090.72-31,638.54-5,509.56

Finding the Fourth Proportional to 21,090.72, 31,638.54 and 5,509.56

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Solution

The fourth proportional to 21,090.72, 31,638.54 and 5,509.56 is: 8,264.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.72 : 31,638.54 = 5,509.56 : x
  2. Step 2: Convert to fraction form
    21,090.72/31,638.54 = 5,509.56/x
  3. Step 3: Cross multiply
    21,090.72x = 31,638.54 × 5,509.56
  4. Step 4: Simplify right side
    21,090.72x = 174,314,434.44
  5. Step 5: Solve for x
    x = 174,314,434.44/21,090.72
  6. Step 6: Final answer
    x = 8,264.98

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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.