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Finding the Fourth Proportional to 31,318.99, 46,980.71 and 12,599.13

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Solution

The fourth proportional to 31,318.99, 46,980.71 and 12,599.13 is: 18,899.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,318.99 : 46,980.71 = 12,599.13 : x
  2. Step 2: Convert to fraction form
    31,318.99/46,980.71 = 12,599.13/x
  3. Step 3: Cross multiply
    31,318.99x = 46,980.71 × 12,599.13
  4. Step 4: Simplify right side
    31,318.99x = 591,916,072.78
  5. Step 5: Solve for x
    x = 591,916,072.78/31,318.99
  6. Step 6: Final answer
    x = 18,899.59

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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.