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Finding the Fourth Proportional to 47,271.93, 70,921.05 and 20,620.25

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Solution

The fourth proportional to 47,271.93, 70,921.05 and 20,620.25 is: 30,936.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,271.93 : 70,921.05 = 20,620.25 : x
  2. Step 2: Convert to fraction form
    47,271.93/70,921.05 = 20,620.25/x
  3. Step 3: Cross multiply
    47,271.93x = 70,921.05 × 20,620.25
  4. Step 4: Simplify right side
    47,271.93x = 1,462,409,781.26
  5. Step 5: Solve for x
    x = 1,462,409,781.26/47,271.93
  6. Step 6: Final answer
    x = 30,936.11

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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.