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Finding the Fourth Proportional to 30,508.76, 42,100.08 and 16,895.90

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Solution

The fourth proportional to 30,508.76, 42,100.08 and 16,895.90 is: 23,315.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,508.76 : 42,100.08 = 16,895.90 : x
  2. Step 2: Convert to fraction form
    30,508.76/42,100.08 = 16,895.90/x
  3. Step 3: Cross multiply
    30,508.76x = 42,100.08 × 16,895.90
  4. Step 4: Simplify right side
    30,508.76x = 711,318,741.67
  5. Step 5: Solve for x
    x = 711,318,741.67/30,508.76
  6. Step 6: Final answer
    x = 23,315.23

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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.