Home / 39,412.85-54,389.89-21,508.25

Finding the Fourth Proportional to 39,412.85, 54,389.89 and 21,508.25

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Solution

The fourth proportional to 39,412.85, 54,389.89 and 21,508.25 is: 29,681.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,412.85 : 54,389.89 = 21,508.25 : x
  2. Step 2: Convert to fraction form
    39,412.85/54,389.89 = 21,508.25/x
  3. Step 3: Cross multiply
    39,412.85x = 54,389.89 × 21,508.25
  4. Step 4: Simplify right side
    39,412.85x = 1,169,831,244.05
  5. Step 5: Solve for x
    x = 1,169,831,244.05/39,412.85
  6. Step 6: Final answer
    x = 29,681.47

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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.