Home / 30,457.42-45,638.92-21,115.60

Finding the Fourth Proportional to 30,457.42, 45,638.92 and 21,115.60

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Solution

The fourth proportional to 30,457.42, 45,638.92 and 21,115.60 is: 31,640.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,457.42 : 45,638.92 = 21,115.60 : x
  2. Step 2: Convert to fraction form
    30,457.42/45,638.92 = 21,115.60/x
  3. Step 3: Cross multiply
    30,457.42x = 45,638.92 × 21,115.60
  4. Step 4: Simplify right side
    30,457.42x = 963,692,845.38
  5. Step 5: Solve for x
    x = 963,692,845.38/30,457.42
  6. Step 6: Final answer
    x = 31,640.66

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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.