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Finding the Fourth Proportional to 39,703.87, 54,792.75 and 21,800.25

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Solution

The fourth proportional to 39,703.87, 54,792.75 and 21,800.25 is: 30,085.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,703.87 : 54,792.75 = 21,800.25 : x
  2. Step 2: Convert to fraction form
    39,703.87/54,792.75 = 21,800.25/x
  3. Step 3: Cross multiply
    39,703.87x = 54,792.75 × 21,800.25
  4. Step 4: Simplify right side
    39,703.87x = 1,194,495,648.19
  5. Step 5: Solve for x
    x = 1,194,495,648.19/39,703.87
  6. Step 6: Final answer
    x = 30,085.12

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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.