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Finding the Fourth Proportional to 31,196.40, 46,810.40 and 13,666.40

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Solution

The fourth proportional to 31,196.40, 46,810.40 and 13,666.40 is: 20,506.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,196.40 : 46,810.40 = 13,666.40 : x
  2. Step 2: Convert to fraction form
    31,196.40/46,810.40 = 13,666.40/x
  3. Step 3: Cross multiply
    31,196.40x = 46,810.40 × 13,666.40
  4. Step 4: Simplify right side
    31,196.40x = 639,729,650.56
  5. Step 5: Solve for x
    x = 639,729,650.56/31,196.40
  6. Step 6: Final answer
    x = 20,506.52

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1.5x scale

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.