Home / 31,856.28-47,784.93-12,135.96

Finding the Fourth Proportional to 31,856.28, 47,784.93 and 12,135.96

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Solution

The fourth proportional to 31,856.28, 47,784.93 and 12,135.96 is: 18,204.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,856.28 : 47,784.93 = 12,135.96 : x
  2. Step 2: Convert to fraction form
    31,856.28/47,784.93 = 12,135.96/x
  3. Step 3: Cross multiply
    31,856.28x = 47,784.93 × 12,135.96
  4. Step 4: Simplify right side
    31,856.28x = 579,915,999.08
  5. Step 5: Solve for x
    x = 579,915,999.08/31,856.28
  6. Step 6: Final answer
    x = 18,204.13

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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.