Home / 47,431.72-71,130.80-20,790.64

Finding the Fourth Proportional to 47,431.72, 71,130.80 and 20,790.64

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Solution

The fourth proportional to 47,431.72, 71,130.80 and 20,790.64 is: 31,178.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,431.72 : 71,130.80 = 20,790.64 : x
  2. Step 2: Convert to fraction form
    47,431.72/71,130.80 = 20,790.64/x
  3. Step 3: Cross multiply
    47,431.72x = 71,130.80 × 20,790.64
  4. Step 4: Simplify right side
    47,431.72x = 1,478,854,855.71
  5. Step 5: Solve for x
    x = 1,478,854,855.71/47,431.72
  6. Step 6: Final answer
    x = 31,178.60

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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.