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Finding the Fourth Proportional to 35,476.79, 48,965.06 and 20,379.80

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Solution

The fourth proportional to 35,476.79, 48,965.06 and 20,379.80 is: 28,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,476.79 : 48,965.06 = 20,379.80 : x
  2. Step 2: Convert to fraction form
    35,476.79/48,965.06 = 20,379.80/x
  3. Step 3: Cross multiply
    35,476.79x = 48,965.06 × 20,379.80
  4. Step 4: Simplify right side
    35,476.79x = 997,898,188.51
  5. Step 5: Solve for x
    x = 997,898,188.51/35,476.79
  6. Step 6: Final answer
    x = 28,128.20

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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.