Home / 30,969.11-42,737.54-18,222.77

Finding the Fourth Proportional to 30,969.11, 42,737.54 and 18,222.77

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Solution

The fourth proportional to 30,969.11, 42,737.54 and 18,222.77 is: 25,147.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,969.11 : 42,737.54 = 18,222.77 : x
  2. Step 2: Convert to fraction form
    30,969.11/42,737.54 = 18,222.77/x
  3. Step 3: Cross multiply
    30,969.11x = 42,737.54 × 18,222.77
  4. Step 4: Simplify right side
    30,969.11x = 778,796,056.98
  5. Step 5: Solve for x
    x = 778,796,056.98/30,969.11
  6. Step 6: Final answer
    x = 25,147.52

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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.