Home / 21,219.57-31,829.40-5,637.15

Finding the Fourth Proportional to 21,219.57, 31,829.40 and 5,637.15

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Solution

The fourth proportional to 21,219.57, 31,829.40 and 5,637.15 is: 8,455.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.57 : 31,829.40 = 5,637.15 : x
  2. Step 2: Convert to fraction form
    21,219.57/31,829.40 = 5,637.15/x
  3. Step 3: Cross multiply
    21,219.57x = 31,829.40 × 5,637.15
  4. Step 4: Simplify right side
    21,219.57x = 179,427,102.21
  5. Step 5: Solve for x
    x = 179,427,102.21/21,219.57
  6. Step 6: Final answer
    x = 8,455.74

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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.