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Finding the Fourth Proportional to 35,679.40, 53,502.90 and 13,485.40

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Solution

The fourth proportional to 35,679.40, 53,502.90 and 13,485.40 is: 20,221.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,679.40 : 53,502.90 = 13,485.40 : x
  2. Step 2: Convert to fraction form
    35,679.40/53,502.90 = 13,485.40/x
  3. Step 3: Cross multiply
    35,679.40x = 53,502.90 × 13,485.40
  4. Step 4: Simplify right side
    35,679.40x = 721,508,007.66
  5. Step 5: Solve for x
    x = 721,508,007.66/35,679.40
  6. Step 6: Final answer
    x = 20,221.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.