Home / 31,136.85-42,968.75-16,989.71

Finding the Fourth Proportional to 31,136.85, 42,968.75 and 16,989.71

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Solution

The fourth proportional to 31,136.85, 42,968.75 and 16,989.71 is: 23,445.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,136.85 : 42,968.75 = 16,989.71 : x
  2. Step 2: Convert to fraction form
    31,136.85/42,968.75 = 16,989.71/x
  3. Step 3: Cross multiply
    31,136.85x = 42,968.75 × 16,989.71
  4. Step 4: Simplify right side
    31,136.85x = 730,026,301.77
  5. Step 5: Solve for x
    x = 730,026,301.77/31,136.85
  6. Step 6: Final answer
    x = 23,445.73

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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.