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Finding the Fourth Proportional to 30,899.16, 42,640.90 and 16,751.90

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Solution

The fourth proportional to 30,899.16, 42,640.90 and 16,751.90 is: 23,117.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,899.16 : 42,640.90 = 16,751.90 : x
  2. Step 2: Convert to fraction form
    30,899.16/42,640.90 = 16,751.90/x
  3. Step 3: Cross multiply
    30,899.16x = 42,640.90 × 16,751.90
  4. Step 4: Simplify right side
    30,899.16x = 714,316,157.43
  5. Step 5: Solve for x
    x = 714,316,157.43/30,899.16
  6. Step 6: Final answer
    x = 23,117.66

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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.