Home / 30,580.08-42,172.08-20,366.88

Finding the Fourth Proportional to 30,580.08, 42,172.08 and 20,366.88

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Solution

The fourth proportional to 30,580.08, 42,172.08 and 20,366.88 is: 28,087.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,580.08 : 42,172.08 = 20,366.88 : x
  2. Step 2: Convert to fraction form
    30,580.08/42,172.08 = 20,366.88/x
  3. Step 3: Cross multiply
    30,580.08x = 42,172.08 × 20,366.88
  4. Step 4: Simplify right side
    30,580.08x = 858,913,692.71
  5. Step 5: Solve for x
    x = 858,913,692.71/30,580.08
  6. Step 6: Final answer
    x = 28,087.36

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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.