Home / 30,957.18-42,731.08-18,209.80

Finding the Fourth Proportional to 30,957.18, 42,731.08 and 18,209.80

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Solution

The fourth proportional to 30,957.18, 42,731.08 and 18,209.80 is: 25,135.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,957.18 : 42,731.08 = 18,209.80 : x
  2. Step 2: Convert to fraction form
    30,957.18/42,731.08 = 18,209.80/x
  3. Step 3: Cross multiply
    30,957.18x = 42,731.08 × 18,209.80
  4. Step 4: Simplify right side
    30,957.18x = 778,124,420.58
  5. Step 5: Solve for x
    x = 778,124,420.58/30,957.18
  6. Step 6: Final answer
    x = 25,135.51

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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.