Home / 39,423.84-54,404.10-21,518.79

Finding the Fourth Proportional to 39,423.84, 54,404.10 and 21,518.79

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Solution

The fourth proportional to 39,423.84, 54,404.10 and 21,518.79 is: 29,695.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,423.84 : 54,404.10 = 21,518.79 : x
  2. Step 2: Convert to fraction form
    39,423.84/54,404.10 = 21,518.79/x
  3. Step 3: Cross multiply
    39,423.84x = 54,404.10 × 21,518.79
  4. Step 4: Simplify right side
    39,423.84x = 1,170,710,403.04
  5. Step 5: Solve for x
    x = 1,170,710,403.04/39,423.84
  6. Step 6: Final answer
    x = 29,695.49

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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.