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Finding the Fourth Proportional to 35,485.20, 48,939.48 and 21,335.40

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Solution

The fourth proportional to 35,485.20, 48,939.48 and 21,335.40 is: 29,424.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,485.20 : 48,939.48 = 21,335.40 : x
  2. Step 2: Convert to fraction form
    35,485.20/48,939.48 = 21,335.40/x
  3. Step 3: Cross multiply
    35,485.20x = 48,939.48 × 21,335.40
  4. Step 4: Simplify right side
    35,485.20x = 1,044,143,381.59
  5. Step 5: Solve for x
    x = 1,044,143,381.59/35,485.20
  6. Step 6: Final answer
    x = 29,424.76

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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.