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Finding the Fourth Proportional to 38,190.50, 52,703.07 and 21,423.50

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Solution

The fourth proportional to 38,190.50, 52,703.07 and 21,423.50 is: 29,564.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,190.50 : 52,703.07 = 21,423.50 : x
  2. Step 2: Convert to fraction form
    38,190.50/52,703.07 = 21,423.50/x
  3. Step 3: Cross multiply
    38,190.50x = 52,703.07 × 21,423.50
  4. Step 4: Simplify right side
    38,190.50x = 1,129,084,220.15
  5. Step 5: Solve for x
    x = 1,129,084,220.15/38,190.50
  6. Step 6: Final answer
    x = 29,564.53

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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.