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Finding the Fourth Proportional to 47,243.64, 70,855.72 and 20,931.60

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Solution

The fourth proportional to 47,243.64, 70,855.72 and 20,931.60 is: 31,393.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,243.64 : 70,855.72 = 20,931.60 : x
  2. Step 2: Convert to fraction form
    47,243.64/70,855.72 = 20,931.60/x
  3. Step 3: Cross multiply
    47,243.64x = 70,855.72 × 20,931.60
  4. Step 4: Simplify right side
    47,243.64x = 1,483,123,588.75
  5. Step 5: Solve for x
    x = 1,483,123,588.75/47,243.64
  6. Step 6: Final answer
    x = 31,393.08

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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.