Home / 30,957.56-42,722.28-18,211.64

Finding the Fourth Proportional to 30,957.56, 42,722.28 and 18,211.64

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Solution

The fourth proportional to 30,957.56, 42,722.28 and 18,211.64 is: 25,132.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,957.56 : 42,722.28 = 18,211.64 : x
  2. Step 2: Convert to fraction form
    30,957.56/42,722.28 = 18,211.64/x
  3. Step 3: Cross multiply
    30,957.56x = 42,722.28 × 18,211.64
  4. Step 4: Simplify right side
    30,957.56x = 778,042,783.34
  5. Step 5: Solve for x
    x = 778,042,783.34/30,957.56
  6. Step 6: Final answer
    x = 25,132.56

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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.