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Finding the Fourth Proportional to 18,835.48, 28,237.02 and 7,157.08

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Solution

The fourth proportional to 18,835.48, 28,237.02 and 7,157.08 is: 10,729.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,835.48 : 28,237.02 = 7,157.08 : x
  2. Step 2: Convert to fraction form
    18,835.48/28,237.02 = 7,157.08/x
  3. Step 3: Cross multiply
    18,835.48x = 28,237.02 × 7,157.08
  4. Step 4: Simplify right side
    18,835.48x = 202,094,611.10
  5. Step 5: Solve for x
    x = 202,094,611.10/18,835.48
  6. Step 6: Final answer
    x = 10,729.46

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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.