Home / 13,721.81-18,936.09-7,434.18

Finding the Fourth Proportional to 13,721.81, 18,936.09 and 7,434.18

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Solution

The fourth proportional to 13,721.81, 18,936.09 and 7,434.18 is: 10,259.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.81 : 18,936.09 = 7,434.18 : x
  2. Step 2: Convert to fraction form
    13,721.81/18,936.09 = 7,434.18/x
  3. Step 3: Cross multiply
    13,721.81x = 18,936.09 × 7,434.18
  4. Step 4: Simplify right side
    13,721.81x = 140,774,280.65
  5. Step 5: Solve for x
    x = 140,774,280.65/13,721.81
  6. Step 6: Final answer
    x = 10,259.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.