Home / 30,969.23-42,737.51-16,821.98

Finding the Fourth Proportional to 30,969.23, 42,737.51 and 16,821.98

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Solution

The fourth proportional to 30,969.23, 42,737.51 and 16,821.98 is: 23,214.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,969.23 : 42,737.51 = 16,821.98 : x
  2. Step 2: Convert to fraction form
    30,969.23/42,737.51 = 16,821.98/x
  3. Step 3: Cross multiply
    30,969.23x = 42,737.51 × 16,821.98
  4. Step 4: Simplify right side
    30,969.23x = 718,929,240.67
  5. Step 5: Solve for x
    x = 718,929,240.67/30,969.23
  6. Step 6: Final answer
    x = 23,214.31

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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.