Home / 31,136.13-42,967.13-16,989.21

Finding the Fourth Proportional to 31,136.13, 42,967.13 and 16,989.21

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Solution

The fourth proportional to 31,136.13, 42,967.13 and 16,989.21 is: 23,444.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,136.13 : 42,967.13 = 16,989.21 : x
  2. Step 2: Convert to fraction form
    31,136.13/42,967.13 = 16,989.21/x
  3. Step 3: Cross multiply
    31,136.13x = 42,967.13 × 16,989.21
  4. Step 4: Simplify right side
    31,136.13x = 729,977,509.72
  5. Step 5: Solve for x
    x = 729,977,509.72/31,136.13
  6. Step 6: Final answer
    x = 23,444.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.