Home / 31,807.76-47,708.40-8,436.56

Finding the Fourth Proportional to 31,807.76, 47,708.40 and 8,436.56

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Solution

The fourth proportional to 31,807.76, 47,708.40 and 8,436.56 is: 12,653.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,807.76 : 47,708.40 = 8,436.56 : x
  2. Step 2: Convert to fraction form
    31,807.76/47,708.40 = 8,436.56/x
  3. Step 3: Cross multiply
    31,807.76x = 47,708.40 × 8,436.56
  4. Step 4: Simplify right side
    31,807.76x = 402,494,779.10
  5. Step 5: Solve for x
    x = 402,494,779.10/31,807.76
  6. Step 6: Final answer
    x = 12,653.98

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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.