Home / 31,838.55-47,759.40-12,118.64

Finding the Fourth Proportional to 31,838.55, 47,759.40 and 12,118.64

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Solution

The fourth proportional to 31,838.55, 47,759.40 and 12,118.64 is: 18,178.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,838.55 : 47,759.40 = 12,118.64 : x
  2. Step 2: Convert to fraction form
    31,838.55/47,759.40 = 12,118.64/x
  3. Step 3: Cross multiply
    31,838.55x = 47,759.40 × 12,118.64
  4. Step 4: Simplify right side
    31,838.55x = 578,778,736.42
  5. Step 5: Solve for x
    x = 578,778,736.42/31,838.55
  6. Step 6: Final answer
    x = 18,178.55

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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.