Home / 31,890.65-47,804.99-17,857.40

Finding the Fourth Proportional to 31,890.65, 47,804.99 and 17,857.40

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Solution

The fourth proportional to 31,890.65, 47,804.99 and 17,857.40 is: 26,768.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,890.65 : 47,804.99 = 17,857.40 : x
  2. Step 2: Convert to fraction form
    31,890.65/47,804.99 = 17,857.40/x
  3. Step 3: Cross multiply
    31,890.65x = 47,804.99 × 17,857.40
  4. Step 4: Simplify right side
    31,890.65x = 853,672,500.11
  5. Step 5: Solve for x
    x = 853,672,500.11/31,890.65
  6. Step 6: Final answer
    x = 26,768.74

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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.