Home / 21,160.26-31,740.84-7,120.71

Finding the Fourth Proportional to 21,160.26, 31,740.84 and 7,120.71

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Solution

The fourth proportional to 21,160.26, 31,740.84 and 7,120.71 is: 10,681.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.26 : 31,740.84 = 7,120.71 : x
  2. Step 2: Convert to fraction form
    21,160.26/31,740.84 = 7,120.71/x
  3. Step 3: Cross multiply
    21,160.26x = 31,740.84 × 7,120.71
  4. Step 4: Simplify right side
    21,160.26x = 226,017,316.80
  5. Step 5: Solve for x
    x = 226,017,316.80/21,160.26
  6. Step 6: Final answer
    x = 10,681.22

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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.