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Finding the Fourth Proportional to 18,421.59, 25,421.99 and 10,038.09

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Solution

The fourth proportional to 18,421.59, 25,421.99 and 10,038.09 is: 13,852.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,421.59 : 25,421.99 = 10,038.09 : x
  2. Step 2: Convert to fraction form
    18,421.59/25,421.99 = 10,038.09/x
  3. Step 3: Cross multiply
    18,421.59x = 25,421.99 × 10,038.09
  4. Step 4: Simplify right side
    18,421.59x = 255,188,223.60
  5. Step 5: Solve for x
    x = 255,188,223.60/18,421.59
  6. Step 6: Final answer
    x = 13,852.67

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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.