Home / 21,225.90-31,834.77-20,172.23

Finding the Fourth Proportional to 21,225.90, 31,834.77 and 20,172.23

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Solution

The fourth proportional to 21,225.90, 31,834.77 and 20,172.23 is: 30,254.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225.90 : 31,834.77 = 20,172.23 : x
  2. Step 2: Convert to fraction form
    21,225.90/31,834.77 = 20,172.23/x
  3. Step 3: Cross multiply
    21,225.90x = 31,834.77 × 20,172.23
  4. Step 4: Simplify right side
    21,225.90x = 642,178,302.44
  5. Step 5: Solve for x
    x = 642,178,302.44/21,225.90
  6. Step 6: Final answer
    x = 30,254.47

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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.