Home / 31,009.12-46,513.70-9,121.12

Finding the Fourth Proportional to 31,009.12, 46,513.70 and 9,121.12

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Solution

The fourth proportional to 31,009.12, 46,513.70 and 9,121.12 is: 13,681.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,009.12 : 46,513.70 = 9,121.12 : x
  2. Step 2: Convert to fraction form
    31,009.12/46,513.70 = 9,121.12/x
  3. Step 3: Cross multiply
    31,009.12x = 46,513.70 × 9,121.12
  4. Step 4: Simplify right side
    31,009.12x = 424,257,039.34
  5. Step 5: Solve for x
    x = 424,257,039.34/31,009.12
  6. Step 6: Final answer
    x = 13,681.69

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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.