Home / 20,728.14-28,597.23-13,280.46

Finding the Fourth Proportional to 20,728.14, 28,597.23 and 13,280.46

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Solution

The fourth proportional to 20,728.14, 28,597.23 and 13,280.46 is: 18,322.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.14 : 28,597.23 = 13,280.46 : x
  2. Step 2: Convert to fraction form
    20,728.14/28,597.23 = 13,280.46/x
  3. Step 3: Cross multiply
    20,728.14x = 28,597.23 × 13,280.46
  4. Step 4: Simplify right side
    20,728.14x = 379,784,369.13
  5. Step 5: Solve for x
    x = 379,784,369.13/20,728.14
  6. Step 6: Final answer
    x = 18,322.16

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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.