Home / 30,485.56-42,047.46-21,523.72

Finding the Fourth Proportional to 30,485.56, 42,047.46 and 21,523.72

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Solution

The fourth proportional to 30,485.56, 42,047.46 and 21,523.72 is: 29,686.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,485.56 : 42,047.46 = 21,523.72 : x
  2. Step 2: Convert to fraction form
    30,485.56/42,047.46 = 21,523.72/x
  3. Step 3: Cross multiply
    30,485.56x = 42,047.46 × 21,523.72
  4. Step 4: Simplify right side
    30,485.56x = 905,017,755.75
  5. Step 5: Solve for x
    x = 905,017,755.75/30,485.56
  6. Step 6: Final answer
    x = 29,686.77

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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.