Home / 18,990.23-28,459.55-10,536.80

Finding the Fourth Proportional to 18,990.23, 28,459.55 and 10,536.80

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Solution

The fourth proportional to 18,990.23, 28,459.55 and 10,536.80 is: 15,790.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.23 : 28,459.55 = 10,536.80 : x
  2. Step 2: Convert to fraction form
    18,990.23/28,459.55 = 10,536.80/x
  3. Step 3: Cross multiply
    18,990.23x = 28,459.55 × 10,536.80
  4. Step 4: Simplify right side
    18,990.23x = 299,872,391.46
  5. Step 5: Solve for x
    x = 299,872,391.46/18,990.23
  6. Step 6: Final answer
    x = 15,790.88

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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.