Home / 30,957.24-42,719.85-16,809.78

Finding the Fourth Proportional to 30,957.24, 42,719.85 and 16,809.78

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Solution

The fourth proportional to 30,957.24, 42,719.85 and 16,809.78 is: 23,196.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,957.24 : 42,719.85 = 16,809.78 : x
  2. Step 2: Convert to fraction form
    30,957.24/42,719.85 = 16,809.78/x
  3. Step 3: Cross multiply
    30,957.24x = 42,719.85 × 16,809.78
  4. Step 4: Simplify right side
    30,957.24x = 718,111,280.13
  5. Step 5: Solve for x
    x = 718,111,280.13/30,957.24
  6. Step 6: Final answer
    x = 23,196.88

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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.