Home / 30,102.95-45,059.72-20,687.91

Finding the Fourth Proportional to 30,102.95, 45,059.72 and 20,687.91

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Solution

The fourth proportional to 30,102.95, 45,059.72 and 20,687.91 is: 30,966.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,102.95 : 45,059.72 = 20,687.91 : x
  2. Step 2: Convert to fraction form
    30,102.95/45,059.72 = 20,687.91/x
  3. Step 3: Cross multiply
    30,102.95x = 45,059.72 × 20,687.91
  4. Step 4: Simplify right side
    30,102.95x = 932,191,328.55
  5. Step 5: Solve for x
    x = 932,191,328.55/30,102.95
  6. Step 6: Final answer
    x = 30,966.78

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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.