Home / 20,218.41-30,307.23-12,808.53

Finding the Fourth Proportional to 20,218.41, 30,307.23 and 12,808.53

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Solution

The fourth proportional to 20,218.41, 30,307.23 and 12,808.53 is: 19,199.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.41 : 30,307.23 = 12,808.53 : x
  2. Step 2: Convert to fraction form
    20,218.41/30,307.23 = 12,808.53/x
  3. Step 3: Cross multiply
    20,218.41x = 30,307.23 × 12,808.53
  4. Step 4: Simplify right side
    20,218.41x = 388,191,064.67
  5. Step 5: Solve for x
    x = 388,191,064.67/20,218.41
  6. Step 6: Final answer
    x = 19,199.88

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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.