Home / 21,155.02-31,710.21-7,101.73

Finding the Fourth Proportional to 21,155.02, 31,710.21 and 7,101.73

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Solution

The fourth proportional to 21,155.02, 31,710.21 and 7,101.73 is: 10,645.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.02 : 31,710.21 = 7,101.73 : x
  2. Step 2: Convert to fraction form
    21,155.02/31,710.21 = 7,101.73/x
  3. Step 3: Cross multiply
    21,155.02x = 31,710.21 × 7,101.73
  4. Step 4: Simplify right side
    21,155.02x = 225,197,349.66
  5. Step 5: Solve for x
    x = 225,197,349.66/21,155.02
  6. Step 6: Final answer
    x = 10,645.10

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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.