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Finding the Fourth Proportional to 20,153.55, 30,228.71 and 7,004.01

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Solution

The fourth proportional to 20,153.55, 30,228.71 and 7,004.01 is: 10,505.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,153.55 : 30,228.71 = 7,004.01 : x
  2. Step 2: Convert to fraction form
    20,153.55/30,228.71 = 7,004.01/x
  3. Step 3: Cross multiply
    20,153.55x = 30,228.71 × 7,004.01
  4. Step 4: Simplify right side
    20,153.55x = 211,722,152.11
  5. Step 5: Solve for x
    x = 211,722,152.11/20,153.55
  6. Step 6: Final answer
    x = 10,505.45

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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.