Home / 21,157.23-31,730.63-8,680.80

Finding the Fourth Proportional to 21,157.23, 31,730.63 and 8,680.80

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Solution

The fourth proportional to 21,157.23, 31,730.63 and 8,680.80 is: 13,019.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.23 : 31,730.63 = 8,680.80 : x
  2. Step 2: Convert to fraction form
    21,157.23/31,730.63 = 8,680.80/x
  3. Step 3: Cross multiply
    21,157.23x = 31,730.63 × 8,680.80
  4. Step 4: Simplify right side
    21,157.23x = 275,447,209.50
  5. Step 5: Solve for x
    x = 275,447,209.50/21,157.23
  6. Step 6: Final answer
    x = 13,019.06

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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.