Home / 20,586.90-28,410.42-12,624.39

Finding the Fourth Proportional to 20,586.90, 28,410.42 and 12,624.39

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Solution

The fourth proportional to 20,586.90, 28,410.42 and 12,624.39 is: 17,421.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.90 : 28,410.42 = 12,624.39 : x
  2. Step 2: Convert to fraction form
    20,586.90/28,410.42 = 12,624.39/x
  3. Step 3: Cross multiply
    20,586.90x = 28,410.42 × 12,624.39
  4. Step 4: Simplify right side
    20,586.90x = 358,664,222.14
  5. Step 5: Solve for x
    x = 358,664,222.14/20,586.90
  6. Step 6: Final answer
    x = 17,421.96

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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.