Home / 39,440.79-54,432.81-21,979.89

Finding the Fourth Proportional to 39,440.79, 54,432.81 and 21,979.89

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Solution

The fourth proportional to 39,440.79, 54,432.81 and 21,979.89 is: 30,334.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,440.79 : 54,432.81 = 21,979.89 : x
  2. Step 2: Convert to fraction form
    39,440.79/54,432.81 = 21,979.89/x
  3. Step 3: Cross multiply
    39,440.79x = 54,432.81 × 21,979.89
  4. Step 4: Simplify right side
    39,440.79x = 1,196,427,176.19
  5. Step 5: Solve for x
    x = 1,196,427,176.19/39,440.79
  6. Step 6: Final answer
    x = 30,334.77

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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.