Home / 20,130.30-30,195.45-18,672.30

Finding the Fourth Proportional to 20,130.30, 30,195.45 and 18,672.30

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Solution

The fourth proportional to 20,130.30, 30,195.45 and 18,672.30 is: 28,008.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.30 : 30,195.45 = 18,672.30 : x
  2. Step 2: Convert to fraction form
    20,130.30/30,195.45 = 18,672.30/x
  3. Step 3: Cross multiply
    20,130.30x = 30,195.45 × 18,672.30
  4. Step 4: Simplify right side
    20,130.30x = 563,818,501.04
  5. Step 5: Solve for x
    x = 563,818,501.04/20,130.30
  6. Step 6: Final answer
    x = 28,008.45

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Double scale
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Similar ratio
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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.