Home / 20,485.28-28,263.12-12,100.16

Finding the Fourth Proportional to 20,485.28, 28,263.12 and 12,100.16

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Solution

The fourth proportional to 20,485.28, 28,263.12 and 12,100.16 is: 16,694.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.28 : 28,263.12 = 12,100.16 : x
  2. Step 2: Convert to fraction form
    20,485.28/28,263.12 = 12,100.16/x
  3. Step 3: Cross multiply
    20,485.28x = 28,263.12 × 12,100.16
  4. Step 4: Simplify right side
    20,485.28x = 341,988,274.10
  5. Step 5: Solve for x
    x = 341,988,274.10/20,485.28
  6. Step 6: Final answer
    x = 16,694.34

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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.