Home / 20,554.74-30,830.84-12,658.76

Finding the Fourth Proportional to 20,554.74, 30,830.84 and 12,658.76

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Solution

The fourth proportional to 20,554.74, 30,830.84 and 12,658.76 is: 18,987.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,554.74 : 30,830.84 = 12,658.76 : x
  2. Step 2: Convert to fraction form
    20,554.74/30,830.84 = 12,658.76/x
  3. Step 3: Cross multiply
    20,554.74x = 30,830.84 × 12,658.76
  4. Step 4: Simplify right side
    20,554.74x = 390,280,204.16
  5. Step 5: Solve for x
    x = 390,280,204.16/20,554.74
  6. Step 6: Final answer
    x = 18,987.36

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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.