Home / 39,434.79-54,420.10-21,529.80

Finding the Fourth Proportional to 39,434.79, 54,420.10 and 21,529.80

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Solution

The fourth proportional to 39,434.79, 54,420.10 and 21,529.80 is: 29,711.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,434.79 : 54,420.10 = 21,529.80 : x
  2. Step 2: Convert to fraction form
    39,434.79/54,420.10 = 21,529.80/x
  3. Step 3: Cross multiply
    39,434.79x = 54,420.10 × 21,529.80
  4. Step 4: Simplify right side
    39,434.79x = 1,171,653,815.16
  5. Step 5: Solve for x
    x = 1,171,653,815.16/39,434.79
  6. Step 6: Final answer
    x = 29,711.17

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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.