Home / 19,688.79-27,180.21-13,643.61

Finding the Fourth Proportional to 19,688.79, 27,180.21 and 13,643.61

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Solution

The fourth proportional to 19,688.79, 27,180.21 and 13,643.61 is: 18,834.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,688.79 : 27,180.21 = 13,643.61 : x
  2. Step 2: Convert to fraction form
    19,688.79/27,180.21 = 13,643.61/x
  3. Step 3: Cross multiply
    19,688.79x = 27,180.21 × 13,643.61
  4. Step 4: Simplify right side
    19,688.79x = 370,836,184.96
  5. Step 5: Solve for x
    x = 370,836,184.96/19,688.79
  6. Step 6: Final answer
    x = 18,834.89

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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.