Home / 42,784.60-64,167.30-20,586.64

Finding the Fourth Proportional to 42,784.60, 64,167.30 and 20,586.64

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Solution

The fourth proportional to 42,784.60, 64,167.30 and 20,586.64 is: 30,875.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,784.60 : 64,167.30 = 20,586.64 : x
  2. Step 2: Convert to fraction form
    42,784.60/64,167.30 = 20,586.64/x
  3. Step 3: Cross multiply
    42,784.60x = 64,167.30 × 20,586.64
  4. Step 4: Simplify right side
    42,784.60x = 1,320,989,104.87
  5. Step 5: Solve for x
    x = 1,320,989,104.87/42,784.60
  6. Step 6: Final answer
    x = 30,875.34

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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.