Home / 31,003.52-42,784.90-16,856.36

Finding the Fourth Proportional to 31,003.52, 42,784.90 and 16,856.36

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Solution

The fourth proportional to 31,003.52, 42,784.90 and 16,856.36 is: 23,261.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,003.52 : 42,784.90 = 16,856.36 : x
  2. Step 2: Convert to fraction form
    31,003.52/42,784.90 = 16,856.36/x
  3. Step 3: Cross multiply
    31,003.52x = 42,784.90 × 16,856.36
  4. Step 4: Simplify right side
    31,003.52x = 721,197,676.96
  5. Step 5: Solve for x
    x = 721,197,676.96/31,003.52
  6. Step 6: Final answer
    x = 23,261.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.