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Finding the Fourth Proportional to 30,535.80, 45,811.80 and 10,812.30

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Solution

The fourth proportional to 30,535.80, 45,811.80 and 10,812.30 is: 16,221.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,535.80 : 45,811.80 = 10,812.30 : x
  2. Step 2: Convert to fraction form
    30,535.80/45,811.80 = 10,812.30/x
  3. Step 3: Cross multiply
    30,535.80x = 45,811.80 × 10,812.30
  4. Step 4: Simplify right side
    30,535.80x = 495,330,925.14
  5. Step 5: Solve for x
    x = 495,330,925.14/30,535.80
  6. Step 6: Final answer
    x = 16,221.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.