Home / 30,963.28-42,729.64-16,816.40

Finding the Fourth Proportional to 30,963.28, 42,729.64 and 16,816.40

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Solution

The fourth proportional to 30,963.28, 42,729.64 and 16,816.40 is: 23,206.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,963.28 : 42,729.64 = 16,816.40 : x
  2. Step 2: Convert to fraction form
    30,963.28/42,729.64 = 16,816.40/x
  3. Step 3: Cross multiply
    30,963.28x = 42,729.64 × 16,816.40
  4. Step 4: Simplify right side
    30,963.28x = 718,558,718.10
  5. Step 5: Solve for x
    x = 718,558,718.10/30,963.28
  6. Step 6: Final answer
    x = 23,206.80

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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.