Home / 39,221.35-54,123.21-21,316.23

Finding the Fourth Proportional to 39,221.35, 54,123.21 and 21,316.23

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Solution

The fourth proportional to 39,221.35, 54,123.21 and 21,316.23 is: 29,415.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,221.35 : 54,123.21 = 21,316.23 : x
  2. Step 2: Convert to fraction form
    39,221.35/54,123.21 = 21,316.23/x
  3. Step 3: Cross multiply
    39,221.35x = 54,123.21 × 21,316.23
  4. Step 4: Simplify right side
    39,221.35x = 1,153,702,792.70
  5. Step 5: Solve for x
    x = 1,153,702,792.70/39,221.35
  6. Step 6: Final answer
    x = 29,415.17

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Double scale
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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.