Home / 20,642.57-28,435.70-17,607.80

Finding the Fourth Proportional to 20,642.57, 28,435.70 and 17,607.80

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Solution

The fourth proportional to 20,642.57, 28,435.70 and 17,607.80 is: 24,255.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.57 : 28,435.70 = 17,607.80 : x
  2. Step 2: Convert to fraction form
    20,642.57/28,435.70 = 17,607.80/x
  3. Step 3: Cross multiply
    20,642.57x = 28,435.70 × 17,607.80
  4. Step 4: Simplify right side
    20,642.57x = 500,689,888.24
  5. Step 5: Solve for x
    x = 500,689,888.24/20,642.57
  6. Step 6: Final answer
    x = 24,255.22

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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.