Home / 39,979.68-59,956.56-13,688.16

Finding the Fourth Proportional to 39,979.68, 59,956.56 and 13,688.16

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Solution

The fourth proportional to 39,979.68, 59,956.56 and 13,688.16 is: 20,527.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,979.68 : 59,956.56 = 13,688.16 : x
  2. Step 2: Convert to fraction form
    39,979.68/59,956.56 = 13,688.16/x
  3. Step 3: Cross multiply
    39,979.68x = 59,956.56 × 13,688.16
  4. Step 4: Simplify right side
    39,979.68x = 820,694,986.33
  5. Step 5: Solve for x
    x = 820,694,986.33/39,979.68
  6. Step 6: Final answer
    x = 20,527.80

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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.