Home / 39,289.05-54,220.03-21,385.21

Finding the Fourth Proportional to 39,289.05, 54,220.03 and 21,385.21

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Solution

The fourth proportional to 39,289.05, 54,220.03 and 21,385.21 is: 29,512.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,289.05 : 54,220.03 = 21,385.21 : x
  2. Step 2: Convert to fraction form
    39,289.05/54,220.03 = 21,385.21/x
  3. Step 3: Cross multiply
    39,289.05x = 54,220.03 × 21,385.21
  4. Step 4: Simplify right side
    39,289.05x = 1,159,506,727.76
  5. Step 5: Solve for x
    x = 1,159,506,727.76/39,289.05
  6. Step 6: Final answer
    x = 29,512.21

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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.