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Finding the Fourth Proportional to 15,005.88, 20,683.42 and 10,641.67

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Solution

The fourth proportional to 15,005.88, 20,683.42 and 10,641.67 is: 14,667.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,005.88 : 20,683.42 = 10,641.67 : x
  2. Step 2: Convert to fraction form
    15,005.88/20,683.42 = 10,641.67/x
  3. Step 3: Cross multiply
    15,005.88x = 20,683.42 × 10,641.67
  4. Step 4: Simplify right side
    15,005.88x = 220,106,051.80
  5. Step 5: Solve for x
    x = 220,106,051.80/15,005.88
  6. Step 6: Final answer
    x = 14,667.99

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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.